diff --git a/css.nanorc b/css.nanorc
index 69c844b..3e6b83c 100644
--- a/css.nanorc
+++ b/css.nanorc
@@ -8,3 +8,6 @@ color brightwhite   start=":" end="[;^\{]"
 color brightblue    ":active|:focus|:hover|:link|:visited|:link|:after|:before|$"
 color brightblue    start="\/\*" end="\*\/"
 color green         ";|:|\{|\}"
+
+## Trailing spaces
+color ,green "[[:space:]]+$"