diff --git a/css-typed-om/Overview.bs b/css-typed-om/Overview.bs
index 052096ec..af7855b2 100644
--- a/css-typed-om/Overview.bs
+++ b/css-typed-om/Overview.bs
@@ -432,6 +432,28 @@ interface CSSAngleValue : CSSStyleValue {
 CSSAngleValue provides attributes that reflect the size of the angle in each of the
 CSS angle units represented by the {{CSSAngleUnit}} enum.
 
+{{CSSColorValue}} objects {#colorvalue-objects}
+---------------------------------------------
+<pre class='idl'>
+
+[Constructor(double r, double g, double b),
+ Constructor(double r, double g, double b, double a)]
+interface CSSColorValue : CSSStyleValue{
+  readonly attribute double r;
+  readonly attribute double g;
+  readonly attribute double b;
+  readonly attribute double a;
+};
+
+</pre>
+
+{{CSSColorValue}} objects represent values of the 'color' CSS data type. {{CSSColorValue}}s are
+initialised using the RGB cubic-coordinate system, which specifies a red, green and blue
+component. These are specified as doubleegers between 0 and 255. An alpha component may also be
+specified in the constructor as a double between 0 and 1.
+
+Issue: Do we want to support other color systems, e.g. HSL?
+
 
 {{CSSTransformValue}} objects {#transformvalue-objects}
 -----------------------------------------------------------