diff --git a/README.md b/README.md
index 795f8189..f9828fd2 100644
--- a/README.md
+++ b/README.md
@@ -181,7 +181,11 @@ Contributions and pull requests are welcome.  Please take note of the following
 *  Adhere to the existing style as much as possible; notably, 2 space indents and long-form keywords.
 *  Keep the history clean! squash your branches before you submit a pull request. `pull --rebase` is your friend.
 *  Any changes to the core should be tested against Vim 7.2.
+
+## Themes
+
 *  If you submit a theme, please create a screenshot so it can be added to the [Wiki][14].
+*  In the majority of cases, modifications to colors of existing themes will likely be rejected.  Themes are a subjective thing, so while you may prefer that a particular color be darker, another user will prefer it to be lighter, or something entirely different.  The more popular the theme, the more unlikely the change will be accepted.  However, it's pretty simple to create your own theme; copy the theme to `~/.vim/autoload/airline/themes` under a new name with your modifications, and it can be used.
 
 # License