diff --git a/misuzu.php b/misuzu.php
index dd36ae30..27ea5cab 100644
--- a/misuzu.php
+++ b/misuzu.php
@@ -267,37 +267,6 @@ MIG;
         'site_url' => config_get('Site', 'url'),
     ]);
 
-    tpl_add_filter('json_decode');
-    tpl_add_filter('byte_symbol');
-    tpl_add_filter('html_link');
-    tpl_add_filter('html_colour');
-    tpl_add_filter('url_construct');
-    tpl_add_filter('country_name', 'get_country_name');
-    tpl_add_filter('flip', 'array_flip');
-    tpl_add_filter('first_paragraph');
-    tpl_add_filter('colour_get_css');
-    tpl_add_filter('colour_get_css_contrast');
-    tpl_add_filter('colour_get_inherit');
-    tpl_add_filter('colour_get_red');
-    tpl_add_filter('colour_get_green');
-    tpl_add_filter('colour_get_blue');
-    tpl_add_filter('parse_line');
-    tpl_add_filter('parse_text');
-    tpl_add_filter('asset_url');
-    tpl_add_filter('vsprintf');
-    tpl_add_filter('perms_check');
-    tpl_add_filter('bg_settings', 'user_background_settings_strings');
-
-    tpl_add_function('get_browser');
-    tpl_add_function('git_commit_hash');
-    tpl_add_function('git_tag');
-    tpl_add_function('csrf_token');
-    tpl_add_function('csrf_input', 'csrf_html');
-    tpl_add_function('startup_time', function (float $time = MSZ_STARTUP) {
-        return microtime(true) - $time;
-    });
-    tpl_add_function('sql_query_count', 'db_query_count');
-
     tpl_add_path(MSZ_ROOT . '/templates');
 
     $misuzuBypassLockdown = !empty($misuzuBypassLockdown);
diff --git a/public/settings.php b/public/settings.php
index 475bce93..fe27f58d 100644
--- a/public/settings.php
+++ b/public/settings.php
@@ -112,6 +112,10 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
     }
 }
 
+tpl_add_filter('log_format', function (string $text, string $json): string {
+    return vsprintf($text, json_decode($json));
+});
+
 $sessions = [
     'list' => [],
     'active' => user_session_current('session_id'),
diff --git a/src/TwigMisuzu.php b/src/TwigMisuzu.php
new file mode 100644
index 00000000..9e5a1b36
--- /dev/null
+++ b/src/TwigMisuzu.php
@@ -0,0 +1,43 @@
+<?php
+namespace Misuzu;
+
+use Twig_Extension;
+use Twig_Filter;
+use Twig_Function;
+
+final class TwigMisuzu extends Twig_Extension
+{
+    public function getFilters()
+    {
+        return [
+            new Twig_Filter('html_colour', 'html_colour'),
+            new Twig_Filter('country_name', 'get_country_name'),
+            new Twig_Filter('first_paragraph', 'first_paragraph'),
+            new Twig_Filter('byte_symbol', 'byte_symbol'),
+            new Twig_Filter('html_link', 'html_link'),
+            new Twig_Filter('url_construct', 'url_construct'),
+            new Twig_Filter('parse_line', 'parse_line'),
+            new Twig_Filter('parse_text', 'parse_text'),
+            new Twig_Filter('asset_url', 'asset_url'),
+            new Twig_Filter('perms_check', 'perms_check'),
+            new Twig_Filter('bg_settings', 'user_background_settings_strings'),
+            new Twig_Filter('colour_contrast', 'colour_get_css_contrast'),
+            new Twig_Filter('colour_props', 'colour_get_properties'),
+        ];
+    }
+
+    public function getFunctions()
+    {
+        return [
+            new Twig_Function('get_browser', 'get_browser'),
+            new Twig_Function('git_commit_hash', 'git_commit_hash'),
+            new Twig_Function('git_tag', 'git_tag'),
+            new Twig_Function('csrf_token', 'csrf_token'),
+            new Twig_Function('csrf_input', 'csrf_html'),
+            new Twig_Function('sql_query_count', 'db_query_count'),
+            new Twig_Function('startup_time', function (float $time = MSZ_STARTUP) {
+                return microtime(true) - $time;
+            }),
+        ];
+    }
+}
diff --git a/src/colour.php b/src/colour.php
index e83b7d08..baaf10d0 100644
--- a/src/colour.php
+++ b/src/colour.php
@@ -139,3 +139,14 @@ function colour_from_hex(int &$colour, string $hex): bool
 
     return true;
 }
+
+function colour_get_properties(int $colour): array
+{
+    return [
+        'red' => colour_get_red($colour),
+        'green' => colour_get_green($colour),
+        'blue' => colour_get_blue($colour),
+        'inherit' => colour_get_inherit($colour),
+        'luminance' => colour_get_luminance($colour),
+    ];
+}
diff --git a/src/tpl.php b/src/tpl.php
index e195f29d..b3cfe693 100644
--- a/src/tpl.php
+++ b/src/tpl.php
@@ -1,5 +1,6 @@
 <?php
 use Misuzu\Twig;
+use Misuzu\TwigMisuzu;
 
 define('MSZ_TPL_FILE_EXT', '.twig');
 define('MSZ_TPL_VARS_STORE', '_msz_tpl_vars');
@@ -18,6 +19,7 @@ function tpl_init(array $options = []): void
     $loader = new Twig_Loader_Filesystem;
     $twig = new Twig($loader, $options);
     $twig->addExtension(new Twig_Extensions_Extension_Date);
+    $twig->addExtension(new TwigMisuzu);
 }
 
 function tpl_var(string $key, $value): void
diff --git a/templates/changelog/change.twig b/templates/changelog/change.twig
index cf753df7..2b72f005 100644
--- a/templates/changelog/change.twig
+++ b/templates/changelog/change.twig
@@ -20,7 +20,7 @@
                 <div class="changelog__change" id="#c{{ change.change_id }}">
                     <div class="changelog__change__line"
                         style="{{ change.action_colour|html_colour('--accent-colour') }}">
-                        <div class="changelog__change__action {{ change.action_class is defined and change.action_class is not null ? ' changelog__change__action--' ~ change.action_class : '' }} changelog__change__action--{{ change.action_colour|colour_get_css_contrast }}"
+                        <div class="changelog__change__action {{ change.action_class is defined and change.action_class is not null ? ' changelog__change__action--' ~ change.action_class : '' }} changelog__change__action--{{ change.action_colour|colour_contrast }}"
                             style="{{ change.action_colour|html_colour('--accent-colour') }}">
                             {{ change.action_name }}
                         </div>
diff --git a/templates/changelog/macros.twig b/templates/changelog/macros.twig
index 1c9b5c23..5c33b4bc 100644
--- a/templates/changelog/macros.twig
+++ b/templates/changelog/macros.twig
@@ -47,7 +47,7 @@
                 </a>
             {% endif %}
 
-            <a class="changelog__action{{ change.action_class is defined and change.action_class is not null ? ' changelog__action--' ~ change.action_class : '' }} changelog__action--{{ change.action_colour|colour_get_css_contrast }}"
+            <a class="changelog__action{{ change.action_class is defined and change.action_class is not null ? ' changelog__action--' ~ change.action_class : '' }} changelog__action--{{ change.action_colour|colour_contrast }}"
                 href="{{ change_url|format(change.change_id) }}"
                 {% if change.action_colour is defined %}style="{{ change.action_colour|html_colour('--action-colour') }}"{% endif %}>
                 <div class="changelog__action__text">
diff --git a/templates/manage/changelog/action_edit.twig b/templates/manage/changelog/action_edit.twig
index c009a914..8f034258 100644
--- a/templates/manage/changelog/action_edit.twig
+++ b/templates/manage/changelog/action_edit.twig
@@ -25,31 +25,33 @@
 
             <h2 class="container__subtitle">Colour</h2>
 
+            {% set colour_props = edit_action.action_colour|default(constant('MSZ_COLOUR_INHERIT'))|colour_props %}
+
             <label class="form__label">
                 <div class="form__label__text">Inherit Colour</div>
                 <div class="form__label__input">
-                    {{ input_checkbox('action[colour][inherit]', '', edit_action is defined and edit_action.action_colour|colour_get_inherit) }}
+                    {{ input_checkbox('action[colour][inherit]', '', colour_props.inherit) }}
                 </div>
             </label>
 
             <label class="form__label">
                 <div class="form__label__text">Red</div>
                 <div class="form__label__input">
-                    {{ input_text('action[colour][red]', '', edit_action is defined ? edit_action.action_colour|colour_get_red : '0', 'number', '', false, {'min':0,'max':255}) }}
+                    {{ input_text('action[colour][red]', '', colour_props.red, 'number', '', false, {'min':0,'max':255}) }}
                 </div>
             </label>
 
             <label class="form__label">
                 <div class="form__label__text">Green</div>
                 <div class="form__label__input">
-                    {{ input_text('action[colour][green]', '', edit_action is defined ? edit_action.action_colour|colour_get_green : '0', 'number', '', false, {'min':0,'max':255}) }}
+                    {{ input_text('action[colour][green]', '', colour_props.green, 'number', '', false, {'min':0,'max':255}) }}
                 </div>
             </label>
 
             <label class="form__label">
                 <div class="form__label__text">Blue</div>
                 <div class="form__label__input">
-                    {{ input_text('action[colour][blue]', '', edit_action is defined ? edit_action.action_colour|colour_get_blue : '0', 'number', '', false, {'min':0,'max':255}) }}
+                    {{ input_text('action[colour][blue]', '', colour_props.blue, 'number', '', false, {'min':0,'max':255}) }}
                 </div>
             </label>
 
diff --git a/templates/manage/users/roles_create.twig b/templates/manage/users/roles_create.twig
index 11f0d2b6..13a75a39 100644
--- a/templates/manage/users/roles_create.twig
+++ b/templates/manage/users/roles_create.twig
@@ -43,31 +43,33 @@
         <div class="container">
             {{ container_title('Colour') }}
 
+            {% set colour_props = edit_role.role_colour|default(constant('MSZ_COLOUR_INHERIT'))|colour_props %}
+
             <label class="form__label">
                 <div class="form__label__text">Inherit Colour</div>
                 <div class="form__label__input">
-                    {{ input_checkbox('role[colour][inherit]', '', edit_role is defined and edit_role.role_colour|colour_get_inherit) }}
+                    {{ input_checkbox('role[colour][inherit]', '', colour_props.inherit) }}
                 </div>
             </label>
 
             <label class="form__label">
                 <div class="form__label__text">Red</div>
                 <div class="form__label__input">
-                    {{ input_text('role[colour][red]', '', edit_role is defined ? edit_role.role_colour|colour_get_red : '0', 'number', '', false, {'min':0,'max':255}) }}
+                    {{ input_text('role[colour][red]', '', colour_props.red, 'number', '', false, {'min':0,'max':255}) }}
                 </div>
             </label>
 
             <label class="form__label">
                 <div class="form__label__text">Green</div>
                 <div class="form__label__input">
-                    {{ input_text('role[colour][green]', '', edit_role is defined ? edit_role.role_colour|colour_get_green : '0', 'number', '', false, {'min':0,'max':255}) }}
+                    {{ input_text('role[colour][green]', '', colour_props.green, 'number', '', false, {'min':0,'max':255}) }}
                 </div>
             </label>
 
             <label class="form__label">
                 <div class="form__label__text">Blue</div>
                 <div class="form__label__input">
-                    {{ input_text('role[colour][blue]', '', edit_role is defined ? edit_role.role_colour|colour_get_blue : '0', 'number', '', false, {'min':0,'max':255}) }}
+                    {{ input_text('role[colour][blue]', '', colour_props.blue, 'number', '', false, {'min':0,'max':255}) }}
                 </div>
             </label>
 
diff --git a/templates/manage/users/view.twig b/templates/manage/users/view.twig
index 3561dd6e..e7ab6b29 100644
--- a/templates/manage/users/view.twig
+++ b/templates/manage/users/view.twig
@@ -109,33 +109,33 @@
             <div class="container">
                 {{ container_title('Colour') }}
 
-                {% set colour_is_defined = view_user is defined and view_user.user_colour is not null and not view_user.user_colour|colour_get_inherit %}
+                {% set colour_props = view_user.user_colour|default(constant('MSZ_COLOUR_INHERIT'))|colour_props %}
 
                 <label class="form__label">
                     <div class="form__label__text">Custom Colour</div>
                     <div class="form__label__input">
-                        {{ input_checkbox('colour[enable]', '', colour_is_defined) }}
+                        {{ input_checkbox('colour[enable]', '', colour_props.inherit) }}
                     </div>
                 </label>
 
                 <label class="form__label">
                     <div class="form__label__text">Red</div>
                     <div class="form__label__input">
-                        {{ input_text('colour[red]', '', colour_is_defined ? view_user.user_colour|colour_get_red : '0', 'number', '', false, {'min':0,'max':255}) }}
+                        {{ input_text('colour[red]', '', colour_props.red, 'number', '', false, {'min':0,'max':255}) }}
                     </div>
                 </label>
 
                 <label class="form__label">
                     <div class="form__label__text">Green</div>
                     <div class="form__label__input">
-                        {{ input_text('colour[green]', '', colour_is_defined ? view_user.user_colour|colour_get_green : '0', 'number', '', false, {'min':0,'max':255}) }}
+                        {{ input_text('colour[green]', '', colour_props.green, 'number', '', false, {'min':0,'max':255}) }}
                     </div>
                 </label>
 
                 <label class="form__label">
                     <div class="form__label__text">Blue</div>
                     <div class="form__label__input">
-                        {{ input_text('colour[blue]', '', colour_is_defined ? view_user.user_colour|colour_get_blue : '0', 'number', '', false, {'min':0,'max':255}) }}
+                        {{ input_text('colour[blue]', '', colour_props.blue, 'number', '', false, {'min':0,'max':255}) }}
                     </div>
                 </label>
             </div>
diff --git a/templates/user/settings.twig b/templates/user/settings.twig
index 6eaab920..c0c7054d 100644
--- a/templates/user/settings.twig
+++ b/templates/user/settings.twig
@@ -259,7 +259,7 @@
                         </div>
                         <div class="settings__log__column__value">
                             {% if log.log_action in logs.strings|keys %}
-                                {{ logs.strings[log.log_action]|vsprintf(log.log_params|json_decode) }}
+                                {{ logs.strings[log.log_action]|log_format(log.log_params) }}
                             {% else %}
                                 {{ log.log_action }}({{ log.log_params }})
                             {% endif %}