[US TRTL-615] Fix header font color set

ui/ui-frontend-common/src/app/modules/theme.service.ts

@@ -214,8 +214,12 @@ export class ThemeService {
       if (this.defaultMap.hasOwnProperty(key)) {
         if (([ThemeColorType.VITAMUI_PRIMARY, ThemeColorType.VITAMUI_SECONDARY, ThemeColorType.VITAMUI_GREY] as string[]).includes(key)) {
           this.add10Declinations(key, colors, customerColors);
-        } else if (ThemeColorType.VITAMUI_HEADER_FOOTER === key) {
-          colors[key + '-font'] = this.calculateFontColor(this.applicationColorMap[key]);
+        } else if (key === ThemeColorType.VITAMUI_HEADER_FOOTER) {
+          if (customerColors[key]) {
+            colors[key + '-font'] = this.calculateFontColor(customerColors[key]);
+          } else {
+            colors[key + '-font'] = this.calculateFontColor(this.applicationColorMap[key]);
+          }
         }
         colors[key] = getColorFromMaps(key, this.defaultMap, this.applicationColorMap, customerColors);
       }