Add Tailwind color palette (#452)

app/assets/stylesheets/application.tailwind.css

@@ -2,6 +2,10 @@
 @tailwind components;
 @tailwind utilities;
 
+/* Reset rules, default styles applied to plain HTML */
+@layer base {
+}
+
 @layer components {
   .prose {
     table {
@@ -43,3 +47,7 @@
     @apply w-full p-3 text-center text-white bg-black rounded-lg hover:bg-gray-700;
   }
 }
+
+/* Small, single purpose classes that should take precedence over other styles */
+@layer utilities {
+}