diff --git a/README.md b/README.md
index f983a48..3cfb364 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,14 @@
 A GUI for the OpenBSD package manager.
 
 You can search for packages by typing text. There is a setting if you want to include packages description into the search.
+
+There are four types of lines coloration:
+- no coloration: package is not installed and not selected
+- green: package is not installed but will be installed
+ 
+- yellow: package is installed
+- red: package is installed but you want to desinstall it
+ 
 [![Package list using search](images/list-fs8.png)](images/list-fs8.png)
 
 You are prompted about your changes before applying changes: