diff --git a/package.json b/package.json
index fe286f2..2b41eb2 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,8 @@
     "ajv": "^8.6.3",
     "bent": "^7.3.12",
     "body-parser": "^1.19.0",
-    "doipjs": "^1.2.4",
+    "colorjs.io": "^0.4.5",
+    "doipjs": "^1.2.5",
     "dotenv": "^16.0.3",
     "express": "^4.17.1",
     "express-http-context2": "^1.0.0",
diff --git a/src/routes/profile.js b/src/routes/profile.js
index f03e2c4..431c125 100644
--- a/src/routes/profile.js
+++ b/src/routes/profile.js
@@ -32,7 +32,7 @@ import bodyParserImport from 'body-parser'
 import { rateLimit } from 'express-rate-limit'
 import { generateSignatureProfile, utils, generateWKDProfile, generateHKPProfile, generateAutoProfile, generateKeybaseProfile } from '../server/index.js'
 import { Profile } from 'doipjs'
-import { getMetaFromReq } from '../server/utils.js'
+import { generateProfileTheme, getMetaFromReq } from '../server/utils.js'
 import logger from '../log.js'
 
 const router = express.Router()
@@ -133,6 +133,7 @@ router.get('/keybase/:username/:fingerprint', profileRateLimiter, async (req, re
 
 router.get('/:id', profileRateLimiter, async (req, res) => {
   const data = await generateAutoProfile(req.params.id)
+  const theme = generateProfileTheme(data)
   const title = utils.generatePageTitle('profile', data)
   res.set('ariadne-identity-proof', data.identifier)
   res.render('profile', {
@@ -140,6 +141,7 @@ router.get('/:id', profileRateLimiter, async (req, res) => {
     data: data instanceof Profile ? data.toJSON() : data,
     enable_message_encryption: false,
     enable_signature_verification: false,
+    theme,
     meta: getMetaFromReq(req)
   })
 })
diff --git a/src/server/utils.js b/src/server/utils.js
index 6ca15ec..a4583ac 100644
--- a/src/server/utils.js
+++ b/src/server/utils.js
@@ -28,6 +28,8 @@ if any, to sign a "copyright disclaimer" for the program, if necessary. For
 more information on this, and how to apply and follow the GNU AGPL, see <https://www.gnu.org/licenses/>.
 */
 import { webcrypto as crypto } from 'crypto'
+import { Profile } from 'doipjs'
+import Color from 'colorjs.io'
 
 export async function computeWKDLocalPart (localPart) {
   const localPartEncoded = new TextEncoder().encode(localPart.toLowerCase())
@@ -87,3 +89,51 @@ export function getMetaFromReq (req) {
     }
   }
 }
+
+export function generateProfileTheme (/** @type {Profile} */ profile) {
+  if (!(profile && profile instanceof Profile)) return null
+
+  if (!profile.personas[profile.primaryPersonaIndex].themeColor) return null
+
+  let base
+  try {
+    base = new Color(profile.personas[profile.primaryPersonaIndex].themeColor)
+  } catch (_) {
+    return null
+  }
+
+  if (base.to('hsl').hsl[0].isNaN) return null
+  if (base.to('hsl').hsl[2] === 0) return null
+
+  const primaryLight = base.to('hsl')
+  primaryLight.hsl[2] = 40
+  const primaryDark = base.to('hsl')
+  primaryDark.hsl[2] = 80
+
+  const primarySubtleLight = base.to('hsl')
+  primarySubtleLight.hsl[2] = 50
+  const primarySubtleDark = base.to('hsl')
+  primarySubtleDark.hsl[2] = 70
+
+  const backgroundLight = base.to('hsl')
+  backgroundLight.hsl[2] = 98
+  const backgroundDark = base.to('hsl')
+  backgroundDark.hsl[1] = 20
+  backgroundDark.hsl[2] = 5
+
+  return {
+    base: base.toString({ format: 'hex' }),
+    primary: {
+      light: primaryLight.toString(),
+      dark: primaryDark.toString()
+    },
+    primarySubtle: {
+      light: primarySubtleLight.toString(),
+      dark: primarySubtleDark.toString()
+    },
+    background: {
+      light: backgroundLight.toString(),
+      dark: backgroundDark.toString()
+    }
+  }
+}
diff --git a/static-src/kx-styles.scss b/static-src/kx-styles.scss
index 41291a6..d9e08b3 100644
--- a/static-src/kx-styles.scss
+++ b/static-src/kx-styles.scss
@@ -58,8 +58,9 @@ kx-claim {
         }
 
         hr {
+            margin: 8px 0;
             border: none;
-            border-top: 2px solid var(--background-color);
+            border-top: 2px solid var(--header-background-color);
         }
 
         .content {
diff --git a/static-src/styles/forms.scss b/static-src/styles/forms.scss
index 7169ad9..835abf3 100644
--- a/static-src/styles/forms.scss
+++ b/static-src/styles/forms.scss
@@ -108,6 +108,18 @@ a.button {
         border-color: var(--button-border-color-hover);
         color: var(--button-text-color-hover);
     }
+
+    &.themed {
+        padding: 8px 12px;
+        color: var(--text-color-inverse);
+        background-color: var(--primary-color);
+        border: 0;
+
+        &:hover {
+            color: var(--text-color-inverse);
+            background-color: var(--primary-color-subtle);
+        }
+    }
 }
 
 button {
diff --git a/static-src/styles/vars.scss b/static-src/styles/vars.scss
index 60065e3..07300ad 100644
--- a/static-src/styles/vars.scss
+++ b/static-src/styles/vars.scss
@@ -64,14 +64,25 @@ more information on this, and how to apply and follow the GNU AGPL, see <https:/
 }
 
 :root {
-    --primary-color: var(--purple-700);
-    --primary-color-subtle: var(--purple-400);
+    --primary-color-light: var(--purple-700);
+    --primary-color-dark: var(--purple-300);
 
-    --body-background-color: #fafafa;
+    --primary-color-subtle-light: var(--purple-400);
+    --primary-color-subtle-dark: var(--purple-500);
+
+    --background-color-light: var(#fafafa);
+    --background-color-dark: var(#0a0a0a);
+}
+:root {
+    --primary-color: var(--primary-color-light);
+    --primary-color-subtle: var(--primary-color-subtle-light);
+
+    --body-background-color: var(--background-color-light);
     --section-background-color: var(--white);
 
     --text-color: var(--grey-800);
     --text-color-subtle: var(--grey-500);
+    --text-color-inverse: var(--white);
     --h1-color: var(--text-color);
     --h2-color: var(--text-color);
     --h2-small-color: var(--primary-color-subtle);
@@ -82,7 +93,7 @@ more information on this, and how to apply and follow the GNU AGPL, see <https:/
 
     --link-color: var(--blue-700);
     --link-color-subtle: var(--text-color);
-    --link-color-hover: var(--purple-700);
+    --link-color-hover: var(--primary-color);
 
     --line-color-subtle: var(--grey-200);
 
@@ -105,14 +116,15 @@ more information on this, and how to apply and follow the GNU AGPL, see <https:/
     @media (prefers-color-scheme: dark) {
         color-scheme: dark;
 
-        --primary-color: var(--purple-300);
-        --primary-color-subtle: var(--purple-500);
+        --primary-color: var(--primary-color-dark);
+        --primary-color-subtle: var(--primary-color-subtle-dark);
 
-        --body-background-color: #0a0a0a;
+        --body-background-color: var(--background-color-dark);
         --section-background-color: var(--grey-900);
 
         --text-color: var(--grey-50);
         --text-color-subtle: var(--grey-300);
+        --text-color-inverse: var(--grey-800);
         --h1-color: var(--text-color);
         --h2-color: var(--text-color);
         --h2-small-color: var(--primary-color-subtle);
diff --git a/views/profile.pug b/views/profile.pug
index 35777cb..d894673 100644
--- a/views/profile.pug
+++ b/views/profile.pug
@@ -111,6 +111,16 @@ block content
             input(type='submit', name='submit', value='Generate profile')
 
       unless (isSignature && !signature)
+        if (theme)
+          style
+            | :root {
+            |   --primary-color-light: #{theme.primary.light};
+            |   --primary-color-dark: #{theme.primary.dark};
+            |   --primary-color-subtle-light: #{theme.primarySubtle.light};
+            |   --primary-color-subtle-dark: #{theme.primarySubtle.dark};
+            |   --background-color-light: #{theme.background.light};
+            |   --background-color-dark: #{theme.background.dark};
+            | }
         .profile__header
           img.profile__avatar.u-logo(src=data.personas[data.primaryPersonaIndex].avatarUrl alt="avatar")
 
@@ -132,8 +142,8 @@ block content
               +generatePersona(persona, false)
           h2 Profile
           if data.verifiers.length > 0
-            button(onClick=`showQR('${data.verifiers[0].url}', 'profile_verifier_url')` aria-label='Show profile ID QR') Keyoxide profile QR
-          button(onClick=`showQR('${data.identifier}', 'profile_identifier')` aria-label='Show profile ID QR') Profile ID QR
+            button.themed(onClick=`showQR('${data.verifiers[0].url}', 'profile_verifier_url')` aria-label='Show profile ID QR') Keyoxide profile QR
+          button.themed(onClick=`showQR('${data.identifier}', 'profile_identifier')` aria-label='Show profile ID QR') Profile ID QR
 
     section
       h2 Profile information
diff --git a/yarn.lock b/yarn.lock
index 94a2a4f..66c193f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1579,6 +1579,11 @@ colorette@^2.0.14:
   resolved "https://registry.yarnpkg.com/colorette/-/colorette-2.0.20.tgz#9eb793e6833067f7235902fcd3b09917a000a95a"
   integrity sha512-IfEDxwoWIjkeXL1eXcDiow4UbKjhLdq6/EuSVR9GMN7KVH3r9gQ83e73hsz1Nd1T3ijd5xv1wcWRYO+D6kCI2w==
 
+colorjs.io@^0.4.5:
+  version "0.4.5"
+  resolved "https://registry.yarnpkg.com/colorjs.io/-/colorjs.io-0.4.5.tgz#7775f787ff90aca7a38f6edb7b7c0f8cce1e6418"
+  integrity sha512-yCtUNCmge7llyfd/Wou19PMAcf5yC3XXhgFoAh6zsO2pGswhUPBaaUh8jzgHnXtXuZyFKzXZNAnyF5i+apICow==
+
 colorspace@1.1.x:
   version "1.1.4"
   resolved "https://registry.yarnpkg.com/colorspace/-/colorspace-1.1.4.tgz#8d442d1186152f60453bf8070cd66eb364e59243"
@@ -1837,10 +1842,10 @@ doctypes@^1.1.0:
   resolved "https://registry.yarnpkg.com/doctypes/-/doctypes-1.1.0.tgz#ea80b106a87538774e8a3a4a5afe293de489e0a9"
   integrity sha512-LLBi6pEqS6Do3EKQ3J0NqHWV5hhb78Pi8vvESYwyOy2c31ZEZVdtitdzsQsKb7878PEERhzUk0ftqGhG6Mz+pQ==
 
-doipjs@^1.2.4:
-  version "1.2.4"
-  resolved "https://registry.yarnpkg.com/doipjs/-/doipjs-1.2.4.tgz#f980ac4a3ca71b4496530a1e877230b7b6a4cec0"
-  integrity sha512-zs/kL/Yc3H4X8SrWW0zf6w6RLWDw2LQ6w/tgx8Kirqf7eMtOO0rur9/0ASCeHvoqRr7O6W7dXnW7nD/I5ZgxDg==
+doipjs@^1.2.5:
+  version "1.2.5"
+  resolved "https://registry.yarnpkg.com/doipjs/-/doipjs-1.2.5.tgz#98d67dad67ec0d0afafcda4e4740c93a964eecd3"
+  integrity sha512-366rS4LpzrGUgf1wfxjLpS46T4whB15m4dW8DfVYLLFYqNhwDVirRhysaexCQ8B4Ns+eCSa7qfpVszSxwGmgkA==
   dependencies:
     "@openpgp/hkp-client" "^0.0.3"
     "@openpgp/wkd-client" "^0.0.4"