Replace blue button and label classes with primary (#19763)

* make blue really blue

* replace blue button and label classes with primary

* add --color-blue-dark

* add light color variants, tweak a few colors

* fix colors

* add comment

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

web_src/js/features/comp/ReactionSelector.js

@@ -16,7 +16,7 @@ export function initCompReactionSelector(parent) {
     if ($(this).hasClass('disabled')) return;
 
     const actionURL = $(this).hasClass('item') ? $(this).closest('.select-reaction').data('action-url') : $(this).data('action-url');
-    const url = `${actionURL}/${$(this).hasClass('blue') ? 'unreact' : 'react'}`;
+    const url = `${actionURL}/${$(this).hasClass('primary') ? 'unreact' : 'react'}`;
     $.ajax({
       type: 'POST',
       url,

web_src/js/features/repo-home.js

@@ -84,8 +84,6 @@ export function initRepoTopicBar() {
       transition: 'horizontal flip',
       duration: 200,
       variation: false,
-      blue: true,
-      basic: true,
     },
     className: {
       label: 'ui small label'