Open the Color Editor from either the Control Window or from the Multi-lister.
Click the color field of the parameter that you want to edit.
The Color Editor opens. Notice that the parameter’s color field in the Control Window is highlighted with a white border, and the Color Editor’s title bar contains the shader name and parameter name.
Once the Color Editor is open, you can select any swatch in the Multi-lister or any parameter’s color field in the Control Window, and the Color Editor updates automatically.
Select Edit > Color.