diff --git a/js/src/admin/components/AdminNav.tsx b/js/src/admin/components/AdminNav.tsx
index c814c8189..badf2b4d5 100644
--- a/js/src/admin/components/AdminNav.tsx
+++ b/js/src/admin/components/AdminNav.tsx
@@ -60,12 +60,15 @@ export default class AdminNav<T> extends Component<T> {
             })
         );
 
-        // items.add('appearance', AdminLinkButton.component({
-        //   href: app.route('appearance'),
-        //   icon: 'fas fa-paint-brush',
-        //   children: app.translator.trans('core.admin.nav.appearance_button'),
-        //   description: app.translator.trans('core.admin.nav.appearance_text')
-        // }));
+        items.add(
+            'appearance',
+            AdminLinkButton.component({
+                href: app.route('appearance'),
+                icon: 'fas fa-paint-brush',
+                children: app.translator.trans('core.admin.nav.appearance_button'),
+                description: app.translator.trans('core.admin.nav.appearance_text'),
+            })
+        );
 
         // items.add('extensions', AdminLinkButton.component({
         //   href: app.route('extensions'),
diff --git a/js/src/admin/components/AppearancePage.tsx b/js/src/admin/components/AppearancePage.tsx
new file mode 100644
index 000000000..774a39055
--- /dev/null
+++ b/js/src/admin/components/AppearancePage.tsx
@@ -0,0 +1,131 @@
+import app from '../app';
+
+import Page from './Page';
+import Button from '../../common/components/Button';
+import Switch from '../../common/components/Switch';
+import EditCustomCssModal from './EditCustomCssModal';
+import EditCustomHeaderModal from './EditCustomHeaderModal';
+import EditCustomFooterModal from './EditCustomFooterModal';
+import UploadImageButton from './UploadImageButton';
+import saveSettings from '../utils/saveSettings';
+
+export default class AppearancePage extends Page {
+    loading = false;
+    primaryColor = m.prop(app.data.settings.theme_primary_color);
+    secondaryColor = m.prop(app.data.settings.theme_secondary_color);
+    darkMode = m.prop(app.data.settings.theme_dark_mode === '1');
+    coloredHeader = m.prop(app.data.settings.theme_colored_header === '1');
+
+    view() {
+        return (
+            <div className="AppearancePage">
+                <div className="container">
+                    <form onsubmit={this.onsubmit.bind(this)}>
+                        <fieldset className="AppearancePage-colors">
+                            <legend>{app.translator.trans('core.admin.appearance.colors_heading')}</legend>
+                            <div className="helpText">{app.translator.trans('core.admin.appearance.colors_text')}</div>
+
+                            <div className="AppearancePage-colors-input">
+                                <input
+                                    className="FormControl"
+                                    type="text"
+                                    placeholder="#aaaaaa"
+                                    value={this.primaryColor()}
+                                    onchange={m.withAttr('value', this.primaryColor)}
+                                />
+                                <input
+                                    className="FormControl"
+                                    type="text"
+                                    placeholder="#aaaaaa"
+                                    value={this.secondaryColor()}
+                                    onchange={m.withAttr('value', this.secondaryColor)}
+                                />
+                            </div>
+
+                            {Switch.component({
+                                state: this.darkMode(),
+                                children: app.translator.trans('core.admin.appearance.dark_mode_label'),
+                                onchange: this.darkMode,
+                            })}
+
+                            {Switch.component({
+                                state: this.coloredHeader(),
+                                children: app.translator.trans('core.admin.appearance.colored_header_label'),
+                                onchange: this.coloredHeader,
+                            })}
+
+                            {Button.component({
+                                className: 'Button Button--primary',
+                                type: 'submit',
+                                children: app.translator.trans('core.admin.appearance.submit_button'),
+                                loading: this.loading,
+                            })}
+                        </fieldset>
+                    </form>
+
+                    <fieldset>
+                        <legend>{app.translator.trans('core.admin.appearance.logo_heading')}</legend>
+                        <div className="helpText">{app.translator.trans('core.admin.appearance.logo_text')}</div>
+                        <UploadImageButton name="logo" />
+                    </fieldset>
+
+                    <fieldset>
+                        <legend>{app.translator.trans('core.admin.appearance.favicon_heading')}</legend>
+                        <div className="helpText">{app.translator.trans('core.admin.appearance.favicon_text')}</div>
+                        <UploadImageButton name="favicon" />
+                    </fieldset>
+
+                    <fieldset>
+                        <legend>{app.translator.trans('core.admin.appearance.custom_header_heading')}</legend>
+                        <div className="helpText">{app.translator.trans('core.admin.appearance.custom_header_text')}</div>
+                        {Button.component({
+                            className: 'Button',
+                            children: app.translator.trans('core.admin.appearance.edit_header_button'),
+                            onclick: () => app.modal.show(EditCustomHeaderModal),
+                        })}
+                    </fieldset>
+
+                    <fieldset>
+                        <legend>{app.translator.trans('core.admin.appearance.custom_footer_heading')}</legend>
+                        <div className="helpText">{app.translator.trans('core.admin.appearance.custom_footer_text')}</div>
+                        {Button.component({
+                            className: 'Button',
+                            children: app.translator.trans('core.admin.appearance.edit_footer_button'),
+                            onclick: () => app.modal.show(EditCustomFooterModal),
+                        })}
+                    </fieldset>
+
+                    <fieldset>
+                        <legend>{app.translator.trans('core.admin.appearance.custom_styles_heading')}</legend>
+                        <div className="helpText">{app.translator.trans('core.admin.appearance.custom_styles_text')}</div>
+                        {Button.component({
+                            className: 'Button',
+                            children: app.translator.trans('core.admin.appearance.edit_css_button'),
+                            onclick: () => app.modal.show(EditCustomCssModal),
+                        })}
+                    </fieldset>
+                </div>
+            </div>
+        );
+    }
+
+    onsubmit(e) {
+        e.preventDefault();
+
+        const hex = /^#[0-9a-f]{3}([0-9a-f]{3})?$/i;
+
+        if (!hex.test(this.primaryColor()) || !hex.test(this.secondaryColor())) {
+            alert(app.translator.trans('core.admin.appearance.enter_hex_message'));
+            return;
+        }
+
+        this.loading = true;
+
+        saveSettings({
+            theme_primary_color: this.primaryColor(),
+            theme_secondary_color: this.secondaryColor(),
+            theme_dark_mode: this.darkMode(),
+            theme_colored_header: this.coloredHeader(),
+        }).then(() => window.location.reload());
+    }
+}
diff --git a/js/src/admin/components/EditCustomCssModal.tsx b/js/src/admin/components/EditCustomCssModal.tsx
new file mode 100644
index 000000000..c7686b085
--- /dev/null
+++ b/js/src/admin/components/EditCustomCssModal.tsx
@@ -0,0 +1,28 @@
+import SettingsModal from './SettingsModal';
+
+export default class EditCustomCssModal extends SettingsModal {
+  className() {
+    return 'EditCustomCssModal Modal--large';
+  }
+
+  title() {
+    return app.translator.trans('core.admin.edit_css.title');
+  }
+
+  form() {
+    return [
+      <p>
+        {app.translator.trans('core.admin.edit_css.customize_text', {
+          a: <a href="https://github.com/flarum/core/tree/master/less" target="_blank" />,
+        })}
+      </p>,
+      <div className="Form-group">
+        <textarea className="FormControl" rows="30" bidi={this.setting('custom_less')} />
+      </div>,
+    ];
+  }
+
+  onsaved() {
+    window.location.reload();
+  }
+}
diff --git a/js/src/admin/components/EditCustomFooterModal.tsx b/js/src/admin/components/EditCustomFooterModal.tsx
new file mode 100644
index 000000000..88d97535e
--- /dev/null
+++ b/js/src/admin/components/EditCustomFooterModal.tsx
@@ -0,0 +1,24 @@
+import SettingsModal from './SettingsModal';
+
+export default class EditCustomFooterModal extends SettingsModal {
+  className() {
+    return 'EditCustomFooterModal Modal--large';
+  }
+
+  title() {
+    return app.translator.trans('core.admin.edit_footer.title');
+  }
+
+  form() {
+    return [
+      <p>{app.translator.trans('core.admin.edit_footer.customize_text')}</p>,
+      <div className="Form-group">
+        <textarea className="FormControl" rows="30" bidi={this.setting('custom_footer')} />
+      </div>,
+    ];
+  }
+
+  onsaved() {
+    window.location.reload();
+  }
+}
diff --git a/js/src/admin/components/EditCustomHeaderModal.tsx b/js/src/admin/components/EditCustomHeaderModal.tsx
new file mode 100644
index 000000000..24625cbd7
--- /dev/null
+++ b/js/src/admin/components/EditCustomHeaderModal.tsx
@@ -0,0 +1,24 @@
+import SettingsModal from './SettingsModal';
+
+export default class EditCustomHeaderModal extends SettingsModal {
+  className() {
+    return 'EditCustomHeaderModal Modal--large';
+  }
+
+  title() {
+    return app.translator.trans('core.admin.edit_header.title');
+  }
+
+  form() {
+    return [
+      <p>{app.translator.trans('core.admin.edit_header.customize_text')}</p>,
+      <div className="Form-group">
+        <textarea className="FormControl" rows="30" bidi={this.setting('custom_header')} />
+      </div>,
+    ];
+  }
+
+  onsaved() {
+    window.location.reload();
+  }
+}
diff --git a/js/src/admin/components/UploadImageButton.tsx b/js/src/admin/components/UploadImageButton.tsx
index fb798cc61..0944dacd3 100644
--- a/js/src/admin/components/UploadImageButton.tsx
+++ b/js/src/admin/components/UploadImageButton.tsx
@@ -35,7 +35,7 @@ export default class UploadImageButton<T extends ButtonProps = ButtonProps> exte
     upload() {
         if (this.loading) return;
 
-        const $input = this.$('<input type="file">');
+        const $input = $('<input type="file">');
 
         $input
             .appendTo('body')
@@ -52,7 +52,7 @@ export default class UploadImageButton<T extends ButtonProps = ButtonProps> exte
                     method: 'POST',
                     url: this.resourceUrl(),
                     serialize: (raw) => raw,
-                    data,
+                    body: data,
                 }).then(this.success.bind(this), this.failure.bind(this));
             });
     }
diff --git a/js/src/admin/routes.ts b/js/src/admin/routes.ts
index 875c9bf1d..a6fa8c869 100644
--- a/js/src/admin/routes.ts
+++ b/js/src/admin/routes.ts
@@ -2,6 +2,7 @@ import BasicsPage from './components/BasicsPage';
 import DashboardPage from './components/DashboardPage';
 import MailPage from './components/MailPage';
 import PermissionsPage from './components/PermissionsPage';
+import AppearancePage from './components/AppearancePage';
 
 export default (app) => {
     app.routes = {
@@ -9,5 +10,6 @@ export default (app) => {
         basics: { path: '/basics', component: BasicsPage },
         mail: { path: '/mail', component: MailPage },
         permissions: { path: '/permissions', component: PermissionsPage },
+        appearance: { path: '/appearance', component: AppearancePage },
     };
 };