Black theme fix badge color (codesandbox#3254)

* move grays800 to grays900

* add gray 800

* swap gray500 with gray600 - part 1

* swap gray500 with gray600 - part 2

* swap gray500 with gray600 - part 3/3

* change template color to work with black theme

Author: siddharthkp

packages/common/src/themes/codesandbox-black.js

@@ -20,7 +20,7 @@ const colors = {
     border: tokens.grays[600],
   },
   activityBarBadge: {
-    background: tokens.reds[500],
+    background: tokens.grays[500],
   },
   button: {
     background: tokens.blues[600],