additional colors under admin control

src/app/services/theme.service.ts

@@ -17,6 +17,10 @@ const COLOR_MAP: ReadonlyArray<{ field: keyof StationConfig; prop: string }> = [
   { field: 'color_success', prop: '--color-success' },
   { field: 'color_danger', prop: '--color-danger' },
   { field: 'color_info', prop: '--color-info' },
+  { field: 'color_white', prop: '--color-white' },
+  { field: 'color_light', prop: '--color-light' },
+  { field: 'color_medium', prop: '--color-medium' },
+  { field: 'color_black', prop: '--color-black' },
 ];
 
 /** Build a gradient CSS value from three color stops. */