diff --git a/content/notes/02-colour-representation.md b/content/notes/02-colour-representation.md
index f96853111..d6f3b855c 100644
--- a/content/notes/02-colour-representation.md
+++ b/content/notes/02-colour-representation.md
@@ -5,4 +5,12 @@ tags:
 - cosc-342
 ---
 
-
+representing colors;
+- RGB
+	- most common
+	- sensors in camera
+	- projects + monitors
+	- 
+- CMYK
+- HSV/HSL
+- others: YUV, CIE
\ No newline at end of file