diff --git a/res/themes/dark/css/_dark.scss b/res/themes/dark/css/_dark.scss
index 4a6db5dd55..f323fb8087 100644
--- a/res/themes/dark/css/_dark.scss
+++ b/res/themes/dark/css/_dark.scss
@@ -184,6 +184,9 @@ $visual-bell-bg-color: #800;
 
 $room-warning-bg-color: $header-panel-bg-color;
 
+$authpage-body-bg-color: $background;
+$authpage-primary-color: $text-primary-color;
+
 $dark-panel-bg-color: $header-panel-bg-color;
 $panel-gradient: rgba(34, 38, 46, 0), rgba(34, 38, 46, 1);
 
diff --git a/res/themes/light-custom/css/_custom.scss b/res/themes/light-custom/css/_custom.scss
index f4685fe8fa..455798a556 100644
--- a/res/themes/light-custom/css/_custom.scss
+++ b/res/themes/light-custom/css/_custom.scss
@@ -82,6 +82,8 @@ $tab-label-fg-color: var(--timeline-text-color);
 // was #4e5054
 $authpage-lang-color: var(--timeline-text-color);
 $roomheader-color: var(--timeline-text-color);
+// was #232f32
+$authpage-primary-color: var(--timeline-text-color);
 // --roomlist-text-secondary-color
 $roomtile-preview-color: var(--roomlist-text-secondary-color);
 $roomlist-header-color: var(--roomlist-text-secondary-color);