diff --git a/public/manage/users/role.php b/public/manage/users/role.php
index b3844321..dce7841c 100644
--- a/public/manage/users/role.php
+++ b/public/manage/users/role.php
@@ -1,6 +1,8 @@
 <?php
 namespace Misuzu;
 
+use Index\Colour\Colour;
+use Index\Colour\ColourRGB;
 use Misuzu\Users\User;
 use Misuzu\Users\UserRole;
 use Misuzu\Users\UserRoleNotFoundException;
@@ -53,9 +55,9 @@ if(!empty($_POST['role']) && is_array($_POST['role']) && CSRF::validateRequest()
     }
 
     if(!empty($_POST['role']['colour']['inherit'])) {
-        $roleColour = Colour::none();
+        $roleColour = \Index\Colour\Colour::none();
     } else {
-        $roleColour = Colour::fromRgb(
+        $roleColour = new ColourRGB(
             (int)($_POST['role']['colour']['red'] ?? -1),
             (int)($_POST['role']['colour']['green'] ?? -1),
             (int)($_POST['role']['colour']['blue'] ?? -1)
diff --git a/public/manage/users/user.php b/public/manage/users/user.php
index dffc7a40..0d82a4bd 100644
--- a/public/manage/users/user.php
+++ b/public/manage/users/user.php
@@ -1,6 +1,7 @@
 <?php
 namespace Misuzu;
 
+use Index\Colour\Colour;
 use Misuzu\Users\User;
 use Misuzu\Users\UserNotFoundException;
 use Misuzu\Users\UserRole;
@@ -138,12 +139,11 @@ if(CSRF::validateRequest() && $canEdit) {
     if(!empty($_POST['colour']) && is_array($_POST['colour'])) {
         $setColour = null;
 
-        if(!empty($_POST['colour']['enable']))
-            try {
-                $setColour = Colour::fromHex((string)($_POST['colour']['hex'] ?? ''));
-            } catch(\Exception $ex) {
-                $notices[] = $ex->getMessage();
-            }
+        if(!empty($_POST['colour']['enable'])) {
+            $setColour = \Index\Colour\Colour::parse((string)($_POST['colour']['hex'] ?? ''));
+            if($setColour->shouldInherit())
+                $notices[] = 'Invalid colour specified.';
+        }
 
         if(empty($notices))
             $userInfo->setColour($setColour);
diff --git a/src/Colour.php b/src/Colour.php
deleted file mode 100644
index bd4285c4..00000000
--- a/src/Colour.php
+++ /dev/null
@@ -1,96 +0,0 @@
-<?php
-namespace Misuzu;
-
-use InvalidArgumentException;
-
-class Colour {
-    private const FLAG_INHERIT = 0x40000000;
-
-    private const READABILITY_THRESHOLD = 186;
-    private const LUMINANCE_WEIGHT_RED = .299;
-    private const LUMINANCE_WEIGHT_GREEN = .587;
-    private const LUMINANCE_WEIGHT_BLUE = .114;
-
-    private int $raw = 0;
-
-    public function __construct(?int $raw = 0) {
-        $this->raw = ($raw ?? 0) & 0x7FFFFFFF;
-    }
-
-    public static function none(): self {
-        return new Colour(self::FLAG_INHERIT);
-    }
-
-    public static function fromRgb(int $red, int $green, int $blue): self {
-        $raw = (($red & 0xFF) << 16)
-            | (($green & 0xFF) << 8)
-            | ($blue & 0xFF);
-        return new Colour($raw);
-    }
-    public static function fromHex(string $hex): self {
-        if($hex[0] === '#')
-            $hex = mb_substr($hex, 1);
-
-        if(!ctype_xdigit($hex))
-            throw new InvalidArgumentException('Argument contains invalid characters.');
-
-        $length = mb_strlen($hex);
-
-        if($length === 3) {
-            $hex = $hex[0] . $hex[0] . $hex[1] . $hex[1] . $hex[2] . $hex[2];
-        } elseif($length !== 6) {
-            throw new InvalidArgumentException('Argument is not a hex string.');
-        }
-
-        return new Colour(hexdec($hex));
-    }
-
-    public function getRaw(): int {
-        return $this->raw;
-    }
-
-    public function getInherit(): bool {
-        return ($this->getRaw() & self::FLAG_INHERIT) > 0;
-    }
-
-    public function getRed(): int {
-        return ($this->getRaw() & 0xFF0000) >> 16;
-    }
-
-    public function getGreen(): int {
-        return ($this->getRaw() & 0xFF00) >> 8;
-    }
-
-    public function getBlue(): int {
-        return ($this->getRaw() & 0xFF);
-    }
-
-    public function getLuminance(): float {
-        return self::LUMINANCE_WEIGHT_RED   * $this->getRed()
-             + self::LUMINANCE_WEIGHT_GREEN * $this->getGreen()
-             + self::LUMINANCE_WEIGHT_BLUE  * $this->getBlue();
-    }
-
-    public function getHex(): string {
-        return str_pad(dechex($this->getRaw() & 0xFFFFFF), 6, '0', STR_PAD_LEFT);
-    }
-
-    public function getCSS(): string {
-        if($this->getInherit())
-            return 'inherit';
-        return '#' . $this->getHex();
-    }
-
-    public function extractCSSContract(
-        string $dark = 'dark', string $light = 'light', bool $inheritIsDark = true
-    ): string {
-        if($this->getInherit())
-            return $inheritIsDark ? $dark : $light;
-
-        return $this->getLuminance() > self::READABILITY_THRESHOLD ? $dark : $light;
-    }
-
-    public function __toString() {
-        return $this->getCSS();
-    }
-}
diff --git a/src/SharpChat/SharpChatRoutes.php b/src/SharpChat/SharpChatRoutes.php
index 7fe84133..9f233ad5 100644
--- a/src/SharpChat/SharpChatRoutes.php
+++ b/src/SharpChat/SharpChatRoutes.php
@@ -1,6 +1,7 @@
 <?php
 namespace Misuzu\SharpChat;
 
+use Index\Colour\Colour;
 use Index\Http\HttpFx;
 use Misuzu\Config\IConfig;
 use Misuzu\Config\CfgType;
@@ -70,7 +71,7 @@ final class SharpChatRoutes {
         return $out;
     }
 
-    public static function login($response, $request): void {
+    public function login($response, $request): void {
         $currentUser = User::getCurrent();
         $configKey = $request->hasParam('legacy') ? 'chatPath.legacy' : 'chatPath.normal';
         $chatPath = $this->config->getValue($configKey, CfgType::T_STR, '/');
@@ -147,7 +148,7 @@ final class SharpChatRoutes {
         return [
             'user_id' => $userInfo->getId(),
             'username' => $userInfo->getUsername(),
-            'colour_raw' => $userInfo->getColour()->getRaw(),
+            'colour_raw' => Colour::toMisuzu($userInfo->getColour()),
             'rank' => $rank = $userInfo->getRank(),
             'perms' => SharpChatPerms::convert($userInfo),
         ];
@@ -238,7 +239,7 @@ final class SharpChatRoutes {
             'success' => true,
             'user_id' => $userInfo->getId(),
             'username' => $userInfo->getUsername(),
-            'colour_raw' => $userInfo->getColour()->getRaw(),
+            'colour_raw' => Colour::toMisuzu($userInfo->getColour()),
             'rank' => $rank = $userInfo->getRank(),
             'hierarchy' => $rank,
             'is_silenced' => date('c', $userInfo->isSilenced() || $userInfo->isBanned() ? ($userInfo->isActiveWarningPermanent() ? strtotime('10 years') : $userInfo->getActiveWarningExpiration()) : 0),
@@ -267,7 +268,7 @@ final class SharpChatRoutes {
                 'user_id' => $userInfo->getId(),
                 'id' => $userInfo->getId(),
                 'username' => $userInfo->getUsername(),
-                'colour_raw' => $userInfo->getColour()->getRaw(),
+                'colour_raw' => Colour::toMisuzu($userInfo->getColour()),
                 'rank' => $rank = $userInfo->getRank(),
                 'ip' => $warning->getUserRemoteAddress(),
                 'is_permanent' => $isPermanent,
diff --git a/src/Users/User.php b/src/Users/User.php
index 7348f8d7..fb3bd791 100644
--- a/src/Users/User.php
+++ b/src/Users/User.php
@@ -4,7 +4,7 @@ namespace Misuzu\Users;
 use DateTime;
 use DateTimeZone;
 use JsonSerializable;
-use Misuzu\Colour;
+use Index\Colour\Colour;
 use Misuzu\DB;
 use Misuzu\HasRankInterface;
 use Misuzu\Memoizer;
@@ -140,17 +140,17 @@ class User implements HasRankInterface, JsonSerializable {
     public function getColour(): Colour { // Swaps role colour in if user has no personal colour
         if($this->realColour === null) {
             $this->realColour = $this->getUserColour();
-            if($this->realColour->getInherit())
+            if($this->realColour->shouldInherit())
                 $this->realColour = $this->getDisplayRole()->getColour();
         }
         return $this->realColour;
     }
     public function setColour(?Colour $colour): self {
-        return $this->setColourRaw($colour === null ? null : $colour->getRaw());
+        return $this->setColourRaw($colour === null ? null : Colour::toMisuzu($colour));
     }
     public function getUserColour(): Colour { // Only ever gets the user's actual colour
         if($this->userColour === null)
-            $this->userColour = new Colour($this->getColourRaw());
+            $this->userColour = Colour::fromMisuzu($this->getColourRaw());
         return $this->userColour;
     }
     public function getColourRaw(): int {
diff --git a/src/Users/UserInfo.php b/src/Users/UserInfo.php
index e5bc47ee..bf8a54ad 100644
--- a/src/Users/UserInfo.php
+++ b/src/Users/UserInfo.php
@@ -2,6 +2,7 @@
 namespace Misuzu\Users;
 
 use Index\DateTime;
+use Index\Colour\Colour;
 
 abstract class UserInfo {
     abstract public function getId(): string;
@@ -14,15 +15,14 @@ abstract class UserInfo {
 
     abstract public function getDisplayRoleId(): string;
 
-    // need Index colour type
-    //abstract public function getColour(): ?int;
+    abstract public function getColour(): Colour;
 
     abstract public function getCreatedDate(): DateTime;
     abstract public function getLastActiveDate(): DateTime;
     abstract public function getDeletedDate(): DateTime;
 
     public function hasColour(): bool {
-        return $this->getColour() !== null;
+        return !$this->getColour()->shouldInherit();
     }
 
     private static DateTime $epoch;
diff --git a/src/Users/UserRole.php b/src/Users/UserRole.php
index d0aeac9f..875e4a2b 100644
--- a/src/Users/UserRole.php
+++ b/src/Users/UserRole.php
@@ -2,7 +2,7 @@
 namespace Misuzu\Users;
 
 use ArrayAccess;
-use Misuzu\Colour;
+use Index\Colour\Colour;
 use Misuzu\DB;
 use Misuzu\HasRankInterface;
 use Misuzu\Memoizer;
@@ -98,12 +98,12 @@ class UserRole implements ArrayAccess, HasRankInterface {
     }
 
     public function getColour(): Colour {
-        if($this->colour === null || ($this->getColourRaw() ?? 0x40000000) !== $this->colour->getRaw())
-            $this->colour = new Colour($this->role_colour ?? 0x40000000);
+        if($this->colour === null || ($this->role_colour ?? 0x40000000) !== Colour::toMisuzu($this->colour))
+            $this->colour = Colour::fromMisuzu($this->role_colour ?? 0x40000000);
         return $this->colour;
     }
     public function setColour(Colour $colour): self {
-        $this->role_colour = $colour->getInherit() ? null : $colour->getRaw();
+        $this->role_colour = $colour->shouldInherit() ? null : Colour::toMisuzu($colour);
         $this->colour = $this->colour;
         return $this;
     }
diff --git a/templates/manage/users/role.twig b/templates/manage/users/role.twig
index b13616bf..1f3491eb 100644
--- a/templates/manage/users/role.twig
+++ b/templates/manage/users/role.twig
@@ -46,7 +46,7 @@
             <label class="form__label">
                 <div class="form__label__text">Inherit Colour</div>
                 <div class="form__label__input">
-                    {{ input_checkbox('role[colour][inherit]', '', role_info is not null ? role_info.colour.inherit : true) }}
+                    {{ input_checkbox('role[colour][inherit]', '', role_info is not null ? role_info.colour.shouldInherit : true) }}
                 </div>
             </label>
 
diff --git a/templates/manage/users/user.twig b/templates/manage/users/user.twig
index 58cbfaab..c9f42e6f 100644
--- a/templates/manage/users/user.twig
+++ b/templates/manage/users/user.twig
@@ -99,11 +99,11 @@
                 <label class="form__label">
                     <div class="form__label__text">Custom Colour</div>
                     <div class="form__label__input">
-                        {{ input_checkbox('colour[enable]', '', not user_info.userColour.inherit, '', '', false, null, not can_edit_user) }}
+                        {{ input_checkbox('colour[enable]', '', not user_info.userColour.shouldInherit, '', '', false, null, not can_edit_user) }}
                     </div>
                 </label>
 
-                {{ input_colour(can_edit_user ? 'colour[hex]' : '', '', '#%s'|format(user_info.userColour.hex)) }}
+                {{ input_colour(can_edit_user ? 'colour[hex]' : '', '', user_info.userColour) }}
             </div>
 
             {# TODO: if the hierarchy of the current user is too low to touch the role then opacity should be lowered and input disabled #}
diff --git a/utility.php b/utility.php
index b7c011e3..afc6dc8b 100644
--- a/utility.php
+++ b/utility.php
@@ -118,27 +118,20 @@ function render_info(?string $message, int $httpCode, string $template = 'errors
 }
 
 function html_colour(?int $colour, $attribs = '--user-colour'): string {
-    $colour = $colour == null ? \Misuzu\Colour::none() : new \Misuzu\Colour($colour);
+    $colour = (string)\Index\Colour\Colour::fromMisuzu($colour ?? 0x40000000);
 
-    if(is_string($attribs)) {
-        $attribs = [
-            $attribs => '%s',
-        ];
-    }
+    if(is_string($attribs))
+        $attribs = [ $attribs => '%s' ];
 
-    if(!$attribs) {
+    if(!$attribs)
         $attribs = [
             'color' => '%s',
             '--user-colour' => '%s',
         ];
-    }
 
     $css = '';
-    $value = $colour->getCSS();
-
-    foreach($attribs as $name => $format) {
-        $css .= $name . ':' . sprintf($format, $value) . ';';
-    }
+    foreach($attribs as $name => $format)
+        $css .= $name . ':' . sprintf($format, $colour) . ';';
 
     return $css;
 }