Document that "bubblegum" is a light theme (#2153)

diff --git a/runtime/help/colors.md b/runtime/help/colors.md
index e340f49544f8f99110d91cae927694b9e77594ff..f2ba5d0f42be0e04e55b537081aaa3b9bdd975d3 100644 (file)
--- a/runtime/help/colors.md
+++ b/runtime/help/colors.md
@@ -69,7 +69,7 @@ themes the most.
 * `darcula`
 * `twilight`
 * `railscast`
-* `bubblegum`
+* `bubblegum` (light theme)
 
 ### 16 color