Make component colors configurable (#28035)

scss/_dropdown.scss

@@ -25,7 +25,7 @@
   padding: $dropdown-padding-y 0;
   margin: $dropdown-spacer 0 0; // override default ul
   font-size: $dropdown-font-size;
-  color: $body-color;
+  color: $dropdown-color;
   text-align: left; // Ensures proper alignment if parent has it changed (e.g., modal footer)
   list-style: none;
   background-color: $dropdown-bg;