additional colors under admin control

src/app/services/station-config.service.ts

@@ -46,6 +46,10 @@ const DEFAULT_CONFIG: StationConfig = {
   color_success: '#4a9e4f',
   color_danger: '#c83030',
   color_info: '#3a8abf',
+  color_white: '#ffffff',
+  color_light: '#f0ebe3',
+  color_medium: '#8a8580',
+  color_black: '#1a1816',
 };
 
 @Injectable({

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. */