fix(calendar): use full-calendar provided custom properties for text color

fixes #207

src/assets/styles/tailwind.css

@@ -30,7 +30,7 @@ footer a:hover {
   padding: 1px 2px;
   background-color: theme('colors.gray.600');
   border-color: theme('colors.gray.900');
-  color: white;
+  --fc-event-text-color: white;
 }
 
 .fc-scroller {
@@ -40,7 +40,7 @@ footer a:hover {
 .otherShow {
   background-color: theme('colors.gray.300');
   border-color: theme('colors.gray.400');
-  color: theme('colors.gray.900');
+  --fc-event-text-color: theme('colors.gray.900');
 }
 
 .otherShow:hover {