diff --git a/static/css/chroma-learn.css b/static/css/chroma-learn.css
index 82489f6062..06eac5fef9 100644
--- a/static/css/chroma-learn.css
+++ b/static/css/chroma-learn.css
@@ -1,3 +1,4 @@
+/* based on base16-snazzy
 /* Background */ .chroma { color: #e2e4e5; background-color: #282a36 }
 /* Other */ .chroma .x {  }
 /* Error */ .chroma .err { color: #ff5c57 }
diff --git a/static/css/chroma-neon.css b/static/css/chroma-neon.css
index 04ad2c1cdc..c5e4968826 100644
--- a/static/css/chroma-neon.css
+++ b/static/css/chroma-neon.css
@@ -1,3 +1,4 @@
+/* based on rrt
 /* Background */ .chroma { color: #f8f8f2; background-color: #000000 }
 /* Other */ .chroma .x {  }
 /* Error */ .chroma .err {  }