diff --git a/README.md b/README.md
index 857c2ba..3ae4f6c 100644
--- a/README.md
+++ b/README.md
@@ -51,9 +51,10 @@ For more advanced use, such as customizing the theme with Sass, you'll need to i
 
 ## Customizing the Theme
 
-For those dipping their toes into customizing sites with CSS, the [CSS Editor](https://omeka.org/s/modules/CSSEditor/) module allows site administrators to write style overrides.
+### CSS classes
+Arc-hive projecct css classes will start with `arc-` as ex: `arc-my-class-name`
+
 
-For advanced CSS and Sass users, Foundation S uses ZURB Foundation Site's toolkit that includes variables and mixins for managing and extending many styles.
 
 ### Sass Tasks