diff --git a/README.md b/README.md
index 397b81d..b27594b 100644
--- a/README.md
+++ b/README.md
@@ -13,9 +13,6 @@ Kosmorro's logo is composed of the "Kosmorro" name in lower case, the last "o" b
 - **Available color themes:**
     - Dark, recommended for display on light background or print
     - Light, recommended for display on dark background
-    - Grey, recommended when the background color cannot be predicted
-
-      **Note:** the grey theme should be used only when the dark and light ones cannot for some reason.
 
 The font used in the full logo is [Raleway](https://www.theleagueofmoveabletype.com/raleway), created by Matt McInerney and distributed by [the League of Moveable Type](https://www.theleagueofmoveabletype.com) under the terms of the [SIL Open Font License](https://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL_web).
 
@@ -35,9 +32,4 @@ The font used in the full logo is [Raleway](https://www.theleagueofmoveabletype.
         <td><img src="svg/kosmorro-logo-white.svg" alt="" />
         <td><img src="svg/kosmorro-icon-white.svg" alt="" />
     </tr>
-    <tr>
-        <th>Grey theme</th>
-        <td><img src="svg/kosmorro-logo-grey.svg" alt="" />
-        <td><img src="svg/kosmorro-icon-grey.svg" alt="" />
-    </tr>
 </table>
diff --git a/png/kosmorro-icon-grey.png b/png/kosmorro-icon-grey.png
deleted file mode 100644
index be00f87..0000000
Binary files a/png/kosmorro-icon-grey.png and /dev/null differ
diff --git a/png/kosmorro-logo-grey.png b/png/kosmorro-logo-grey.png
deleted file mode 100644
index 12a1912..0000000
Binary files a/png/kosmorro-logo-grey.png and /dev/null differ
diff --git a/svg/kosmorro-icon-grey.svg b/svg/kosmorro-icon-grey.svg
deleted file mode 100644
index 3bd5fdd..0000000
--- a/svg/kosmorro-icon-grey.svg
+++ /dev/null
@@ -1,123 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://creativecommons.org/ns#"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   width="13.763412mm"
-   height="14.603307mm"
-   viewBox="0 0 13.763413 14.603307"
-   version="1.1"
-   id="svg8">
-  <defs
-     id="defs2">
-    <clipPath
-       clipPathUnits="userSpaceOnUse"
-       id="clipPath890">
-      <ellipse
-         ry="5.9091215"
-         rx="5.5673323"
-         cy="43.649025"
-         cx="139.07217"
-         id="ellipse892"
-         style="fill:#ffca66;fill-opacity:1;stroke:#000000;stroke-width:0.29875848;stroke-opacity:0.5098038" />
-    </clipPath>
-    <filter
-       style="color-interpolation-filters:sRGB"
-       id="filter847">
-      <feFlood
-         flood-opacity="0.498039"
-         flood-color="rgb(0,0,0)"
-         result="flood"
-         id="feFlood837" />
-      <feComposite
-         in="flood"
-         in2="SourceGraphic"
-         operator="in"
-         result="composite1"
-         id="feComposite839" />
-      <feGaussianBlur
-         in="composite1"
-         stdDeviation="0.5"
-         result="blur"
-         id="feGaussianBlur841" />
-      <feOffset
-         dx="0"
-         dy="0"
-         result="offset"
-         id="feOffset843" />
-      <feComposite
-         in="SourceGraphic"
-         in2="offset"
-         operator="over"
-         result="composite2"
-         id="feComposite845" />
-    </filter>
-    <filter
-       style="color-interpolation-filters:sRGB"
-       id="filter859">
-      <feFlood
-         flood-opacity="0.498039"
-         flood-color="rgb(0,0,0)"
-         result="flood"
-         id="feFlood849" />
-      <feComposite
-         in="flood"
-         in2="SourceGraphic"
-         operator="in"
-         result="composite1"
-         id="feComposite851" />
-      <feGaussianBlur
-         in="composite1"
-         stdDeviation="0.5"
-         result="blur"
-         id="feGaussianBlur853" />
-      <feOffset
-         dx="0"
-         dy="0"
-         result="offset"
-         id="feOffset855" />
-      <feComposite
-         in="SourceGraphic"
-         in2="offset"
-         operator="over"
-         result="composite2"
-         id="feComposite857" />
-    </filter>
-  </defs>
-  <metadata
-     id="metadata5">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title></dc:title>
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     id="g853">
-    <ellipse
-       style="fill:#ffca66;fill-opacity:1;stroke:#000000;stroke-width:0.298758;stroke-opacity:0.509804"
-       id="path844"
-       cx="6.9248123"
-       cy="7.3011923"
-       rx="5.5673323"
-       ry="5.9091215" />
-    <path
-       id="path833"
-       style="font-style:normal;font-variant:normal;font-weight:300;font-stretch:normal;font-size:22.5778px;line-height:1.25;font-family:Raleway;-inkscape-font-specification:'Raleway Light';letter-spacing:0px;word-spacing:0px;fill:#888888;fill-opacity:1;stroke:none;stroke-width:0.264583;filter:url(#filter859)"
-       d="m 6.881711,13.386364 q -1.24178,0 -2.30293,-0.474134 -1.03858,-0.496711 -1.80623,-1.332088 -0.76764,-0.835378 -1.19662,-1.9416888 -0.42898,-1.106311 -0.42898,-2.325511 0,-1.241778 0.42898,-2.348089 0.45156,-1.106311 1.2192,-1.941689 0.76765,-0.835378 1.80622,-1.309511 1.06116,-0.496711 2.28036,-0.496711 1.2192,0 2.25778,0.496711 1.03857,0.474133 1.80622,1.309511 0.79022,0.835378 1.2192,1.941689 0.45155,1.106311 0.45155,2.348089 0,1.2192 -0.45155,2.325511 -0.42898,1.1063108 -1.19662,1.9416888 -0.76765,0.835377 -1.8288,1.332088 -1.03858,0.474134 -2.25778,0.474134 z M 2.275841,7.3580972 q 0,1.038578 0.36125,1.964267 0.36124,0.9031108 0.97084,1.5804438 0.63218,0.677334 1.46756,1.083734 0.83537,0.383822 1.78364,0.383822 0.94827,0 1.78365,-0.383822 0.83537,-0.4064 1.46755,-1.106312 0.63218,-0.699911 0.99342,-1.6030218 0.36125,-0.925689 0.36125,-1.986844 0,-1.038578 -0.36125,-1.941689 -0.36124,-0.925689 -0.99342,-1.603022 -0.63218,-0.699911 -1.46755,-1.106311 -0.8128,-0.4064 -1.76107,-0.4064 -0.94827,0 -1.78365,0.4064 -0.83537,0.4064 -1.46755,1.106311 -0.6096,0.699911 -0.99342,1.648177 -0.36125,0.925689 -0.36125,1.964267 z" />
-    <circle
-       style="fill:#888888;fill-opacity:1;stroke:none;stroke-width:0.286482;stroke-opacity:0.509804;filter:url(#filter847)"
-       id="path844-3"
-       cx="142.83353"
-       cy="44.171246"
-       r="5.5"
-       clip-path="url(#clipPath890)"
-       transform="translate(-132.14736,-36.347833)" />
-  </g>
-</svg>
diff --git a/svg/kosmorro-logo-grey.svg b/svg/kosmorro-logo-grey.svg
deleted file mode 100644
index 76ca02d..0000000
--- a/svg/kosmorro-logo-grey.svg
+++ /dev/null
@@ -1,144 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://creativecommons.org/ns#"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   id="svg8"
-   version="1.1"
-   viewBox="0 0 117.01428 39.778135"
-   height="39.778133mm"
-   width="117.01428mm"
-   sodipodi:docname="kosmorro-logo-grey.svg"
-   inkscape:version="1.0.2 (e86c870879, 2021-01-15, custom)">
-  <sodipodi:namedview
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1"
-     objecttolerance="10"
-     gridtolerance="10"
-     guidetolerance="10"
-     inkscape:pageopacity="0"
-     inkscape:pageshadow="2"
-     inkscape:window-width="1920"
-     inkscape:window-height="1011"
-     id="namedview23"
-     showgrid="false"
-     inkscape:zoom="3.522825"
-     inkscape:cx="221.12935"
-     inkscape:cy="75.171276"
-     inkscape:window-x="0"
-     inkscape:window-y="32"
-     inkscape:window-maximized="1"
-     inkscape:current-layer="svg8" />
-  <defs
-     id="defs2">
-    <clipPath
-       id="clipPath890"
-       clipPathUnits="userSpaceOnUse">
-      <ellipse
-         style="fill:#ffca66;fill-opacity:1;stroke:#000000;stroke-width:0.29875848;stroke-opacity:0.5098038"
-         id="ellipse892"
-         cx="139.07217"
-         cy="43.649025"
-         rx="5.5673323"
-         ry="5.9091215" />
-    </clipPath>
-    <filter
-       style="color-interpolation-filters:sRGB"
-       id="filter836">
-      <feFlood
-         flood-opacity="0.498039"
-         flood-color="rgb(0,0,0)"
-         result="flood"
-         id="feFlood826" />
-      <feComposite
-         in="flood"
-         in2="SourceGraphic"
-         operator="in"
-         result="composite1"
-         id="feComposite828" />
-      <feGaussianBlur
-         in="composite1"
-         stdDeviation="0.5"
-         result="blur"
-         id="feGaussianBlur830" />
-      <feOffset
-         dx="0"
-         dy="0"
-         result="offset"
-         id="feOffset832" />
-      <feComposite
-         in="SourceGraphic"
-         in2="offset"
-         operator="over"
-         result="composite2"
-         id="feComposite834" />
-    </filter>
-  </defs>
-  <metadata
-     id="metadata5">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title />
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     id="g858">
-    <ellipse
-       ry="5.9091215"
-       rx="5.5673323"
-       cy="22.270561"
-       cx="100.1757"
-       id="path844"
-       style="fill:#ffca66;fill-opacity:1;stroke:#000000;stroke-width:0.298758;stroke-opacity:0.509804;filter:url(#filter836)" />
-    <path
-       d="m 19.462346,28.129956 -4.583289,-6.276622 -2.777067,2.551289 v 3.725333 H 10.973102 V 11.648178 h 1.128888 v 11.514667 l 7.134578,-6.750756 h 1.309511 l -4.899377,4.763911 5.057422,6.953956 z"
-       style="font-style:normal;font-variant:normal;font-weight:300;font-stretch:normal;font-size:22.5778px;line-height:1.25;font-family:Raleway;-inkscape-font-specification:'Raleway Light';letter-spacing:0px;word-spacing:0px;fill:#888888;fill-opacity:1;stroke:none;stroke-width:0.264583;filter:url(#filter836)"
-       id="path819" />
-    <path
-       d="m 27.071033,28.355734 q -1.241778,0 -2.302933,-0.474134 -1.038578,-0.496711 -1.806223,-1.332088 -0.767644,-0.835378 -1.196622,-1.941689 -0.428978,-1.106311 -0.428978,-2.325511 0,-1.241778 0.428978,-2.348089 0.451556,-1.106311 1.2192,-1.941689 0.767645,-0.835378 1.806222,-1.309511 1.061156,-0.496711 2.280356,-0.496711 1.2192,0 2.257778,0.496711 1.038577,0.474133 1.806222,1.309511 0.790222,0.835378 1.2192,1.941689 0.451556,1.106311 0.451556,2.348089 0,1.2192 -0.451556,2.325511 -0.428978,1.106311 -1.196622,1.941689 -0.767645,0.835377 -1.8288,1.332088 -1.038578,0.474134 -2.257778,0.474134 z m -4.605867,-6.028267 q 0,1.038578 0.361245,1.964267 0.361244,0.903111 0.970844,1.580444 0.632178,0.677334 1.467556,1.083734 0.835377,0.383822 1.783644,0.383822 0.948267,0 1.783645,-0.383822 0.835377,-0.4064 1.467555,-1.106312 0.632178,-0.699911 0.993422,-1.603022 0.361245,-0.925689 0.361245,-1.986844 0,-1.038578 -0.361245,-1.941689 -0.361244,-0.925689 -0.993422,-1.603022 -0.632178,-0.699911 -1.467555,-1.106311 -0.8128,-0.4064 -1.761067,-0.4064 -0.948267,0 -1.783645,0.4064 -0.835377,0.4064 -1.467555,1.106311 -0.6096,0.699911 -0.993422,1.648177 -0.361245,0.925689 -0.361245,1.964267 z"
-       style="font-style:normal;font-variant:normal;font-weight:300;font-stretch:normal;font-size:22.5778px;line-height:1.25;font-family:Raleway;-inkscape-font-specification:'Raleway Light';letter-spacing:0px;word-spacing:0px;fill:#888888;fill-opacity:1;stroke:none;stroke-width:0.264583;filter:url(#filter836)"
-       id="path821" />
-    <path
-       d="m 39.240435,28.355734 q -1.354667,0 -2.596445,-0.451556 -1.241778,-0.451555 -2.167466,-1.354666 l 0.564444,-0.767645 q 0.948267,0.857956 1.964267,1.264356 1.016,0.4064 2.2352,0.4064 1.535289,0 2.460978,-0.632178 0.948266,-0.654756 0.948266,-1.806222 0,-0.541867 -0.248355,-0.903111 Q 42.175546,23.727289 41.701413,23.478934 41.227279,23.208 40.527368,23.0048 39.827457,22.8016 38.901768,22.575823 37.908346,22.350045 37.163279,22.124267 36.44079,21.898489 35.966657,21.5824 35.492524,21.266312 35.244168,20.814756 35.01839,20.3632 35.01839,19.663289 q 0,-0.880533 0.338667,-1.535289 0.338667,-0.654755 0.925689,-1.083733 0.6096,-0.428978 1.377244,-0.632178 0.790222,-0.225777 1.670756,-0.225777 1.377244,0 2.4384,0.474133 1.061155,0.451555 1.648178,1.174044 l -0.632178,0.6096 q -0.587022,-0.677333 -1.535289,-1.016 -0.925689,-0.338666 -1.986845,-0.338666 -0.654755,0 -1.241777,0.135466 -0.564445,0.135467 -0.993423,0.428978 -0.428977,0.293511 -0.677333,0.767645 -0.248355,0.451555 -0.248355,1.083733 0,0.519289 0.158044,0.835378 0.180622,0.316089 0.541867,0.541866 0.383822,0.225778 0.970844,0.4064 0.587022,0.158045 1.399822,0.361245 1.106311,0.270933 1.964267,0.519289 0.857956,0.248355 1.4224,0.6096 0.587022,0.361244 0.880533,0.857955 0.316089,0.496711 0.316089,1.264356 0,1.580444 -1.241777,2.528711 -1.2192,0.925689 -3.273778,0.925689 z"
-       style="font-style:normal;font-variant:normal;font-weight:300;font-stretch:normal;font-size:22.5778px;line-height:1.25;font-family:Raleway;-inkscape-font-specification:'Raleway Light';letter-spacing:0px;word-spacing:0px;fill:#888888;fill-opacity:1;stroke:none;stroke-width:0.264583;filter:url(#filter836)"
-       id="path823" />
-    <path
-       d="m 63.624412,28.129956 h -1.12889 V 21.5824 q 0,-2.2352 -0.69991,-3.296355 -0.67734,-1.061156 -2.099736,-1.061156 -0.722488,0 -1.377244,0.270934 -0.654756,0.270933 -1.196622,0.767644 -0.541867,0.474133 -0.948267,1.151467 -0.383822,0.654755 -0.6096,1.467555 v 7.247467 H 54.435254 V 21.5824 q 0,-2.257777 -0.677333,-3.296355 -0.677333,-1.061156 -2.099733,-1.061156 -0.722489,0 -1.377245,0.270934 -0.632178,0.248355 -1.174044,0.745066 -0.541867,0.474134 -0.970845,1.151467 -0.4064,0.654756 -0.632178,1.467556 v 7.270044 H 46.374988 V 16.389512 h 1.061155 v 2.799644 q 0.722489,-1.4224 1.896533,-2.212622 1.174045,-0.790222 2.596445,-0.790222 1.490133,0 2.415822,0.880533 0.925689,0.880533 1.106311,2.302933 1.670756,-3.183466 4.605867,-3.183466 1.919111,0 2.731911,1.377244 0.83538,1.354667 0.83538,3.815644 z"
-       style="font-style:normal;font-variant:normal;font-weight:300;font-stretch:normal;font-size:22.5778px;line-height:1.25;font-family:Raleway;-inkscape-font-specification:'Raleway Light';letter-spacing:0px;word-spacing:0px;fill:#888888;fill-opacity:1;stroke:none;stroke-width:0.264583;filter:url(#filter836)"
-       id="path825" />
-    <path
-       d="m 71.955592,28.355734 q -1.24178,0 -2.30294,-0.474134 -1.03857,-0.496711 -1.80622,-1.332088 -0.76764,-0.835378 -1.19662,-1.941689 -0.42898,-1.106311 -0.42898,-2.325511 0,-1.241778 0.42898,-2.348089 0.45155,-1.106311 1.2192,-1.941689 0.76764,-0.835378 1.80622,-1.309511 1.06116,-0.496711 2.28036,-0.496711 1.2192,0 2.25777,0.496711 1.03858,0.474133 1.80623,1.309511 0.79022,0.835378 1.2192,1.941689 0.45155,1.106311 0.45155,2.348089 0,1.2192 -0.45155,2.325511 -0.42898,1.106311 -1.19663,1.941689 -0.76764,0.835377 -1.8288,1.332088 -1.03857,0.474134 -2.25777,0.474134 z m -4.60587,-6.028267 q 0,1.038578 0.36124,1.964267 0.36125,0.903111 0.97085,1.580444 0.63218,0.677334 1.46755,1.083734 0.83538,0.383822 1.78365,0.383822 0.94827,0 1.78364,-0.383822 0.83538,-0.4064 1.46756,-1.106312 0.63218,-0.699911 0.99342,-1.603022 0.36125,-0.925689 0.36125,-1.986844 0,-1.038578 -0.36125,-1.941689 -0.36124,-0.925689 -0.99342,-1.603022 -0.63218,-0.699911 -1.46756,-1.106311 -0.8128,-0.4064 -1.76106,-0.4064 -0.94827,0 -1.78365,0.4064 -0.83538,0.4064 -1.46755,1.106311 -0.6096,0.699911 -0.99343,1.648177 -0.36124,0.925689 -0.36124,1.964267 z"
-       style="font-style:normal;font-variant:normal;font-weight:300;font-stretch:normal;font-size:22.5778px;line-height:1.25;font-family:Raleway;-inkscape-font-specification:'Raleway Light';letter-spacing:0px;word-spacing:0px;fill:#888888;fill-opacity:1;stroke:none;stroke-width:0.264583;filter:url(#filter836)"
-       id="path827" />
-    <path
-       d="m 85.953782,17.405512 q -1.58044,0.04516 -2.77706,0.948266 -1.17405,0.880534 -1.64818,2.4384 v 7.337778 h -1.12889 V 16.389512 h 1.08373 v 2.889955 q 0.6096,-1.241778 1.60303,-2.009422 1.016,-0.790222 2.16746,-0.903111 0.22578,-0.02258 0.4064,-0.02258 0.18063,0 0.29351,0 z"
-       style="font-style:normal;font-variant:normal;font-weight:300;font-stretch:normal;font-size:22.5778px;line-height:1.25;font-family:Raleway;-inkscape-font-specification:'Raleway Light';letter-spacing:0px;word-spacing:0px;fill:#888888;fill-opacity:1;stroke:none;stroke-width:0.264583;filter:url(#filter836)"
-       id="path829" />
-    <path
-       d="m 93.652802,17.405512 q -1.58045,0.04516 -2.77707,0.948266 -1.17404,0.880534 -1.64818,2.4384 v 7.337778 h -1.12889 V 16.389512 h 1.08374 v 2.889955 q 0.6096,-1.241778 1.60302,-2.009422 1.016,-0.790222 2.16747,-0.903111 0.22577,-0.02258 0.4064,-0.02258 0.18062,0 0.29351,0 z"
-       style="font-style:normal;font-variant:normal;font-weight:300;font-stretch:normal;font-size:22.5778px;line-height:1.25;font-family:Raleway;-inkscape-font-specification:'Raleway Light';letter-spacing:0px;word-spacing:0px;fill:#888888;fill-opacity:1;stroke:none;stroke-width:0.264583;filter:url(#filter836)"
-       id="path831" />
-    <path
-       d="m 100.13259,28.355734 q -1.241778,0 -2.302928,-0.474134 -1.03858,-0.496711 -1.80623,-1.332088 -0.76764,-0.835378 -1.19662,-1.941689 -0.42898,-1.106311 -0.42898,-2.325511 0,-1.241778 0.42898,-2.348089 0.45156,-1.106311 1.2192,-1.941689 0.76765,-0.835378 1.80622,-1.309511 1.06116,-0.496711 2.280358,-0.496711 1.2192,0 2.25778,0.496711 1.03857,0.474133 1.80622,1.309511 0.79022,0.835378 1.2192,1.941689 0.45155,1.106311 0.45155,2.348089 0,1.2192 -0.45155,2.325511 -0.42898,1.106311 -1.19662,1.941689 -0.76765,0.835377 -1.8288,1.332088 -1.03858,0.474134 -2.25778,0.474134 z m -4.605868,-6.028267 q 0,1.038578 0.36125,1.964267 0.36124,0.903111 0.97084,1.580444 0.63218,0.677334 1.46756,1.083734 0.83537,0.383822 1.783638,0.383822 0.94827,0 1.78366,-0.383822 0.83537,-0.4064 1.46755,-1.106312 0.63218,-0.699911 0.99341,-1.603022 0.36125,-0.925689 0.36125,-1.986844 0,-1.038578 -0.36125,-1.941689 -0.36124,-0.925689 -0.99341,-1.603022 -0.63219,-0.699911 -1.46755,-1.106311 -0.81281,-0.4064 -1.76108,-0.4064 -0.948268,0 -1.783648,0.4064 -0.83537,0.4064 -1.46755,1.106311 -0.6096,0.699911 -0.99342,1.648177 -0.36125,0.925689 -0.36125,1.964267 z"
-       style="font-style:normal;font-variant:normal;font-weight:300;font-stretch:normal;font-size:22.5778px;line-height:1.25;font-family:Raleway;-inkscape-font-specification:'Raleway Light';letter-spacing:0px;word-spacing:0px;fill:#888888;fill-opacity:1;stroke:none;stroke-width:0.264583;filter:url(#filter836)"
-       id="path833" />
-    <circle
-       transform="translate(-38.896478,-21.378463)"
-       clip-path="url(#clipPath890)"
-       r="5.5"
-       cy="44.171246"
-       cx="142.83353"
-       id="path844-3"
-       style="fill:#888888;fill-opacity:1;stroke:none;stroke-width:0.286482;stroke-opacity:0.509804;filter:url(#filter836)" />
-  </g>
-</svg>