The color you see on the effect on the grid is whatever color you chose in the color palette. Our effects don't have any idea what type of string you are placing them on so the color of the effect doesn't try to change to match your string definition. What happens is when rendering it will grab the color component that matches the string definition. So if you lay down a white effect it will trigger any color. If you define a red string and lay down a green effect it won't trigger it. Its designed so that you can drop full RGB effects on the entire display and the elements will react when their particular color is activated in an effect. So if you drop a Pink effect on the entire display only strings defined with Red, Blue, or RGB will react...Green strings wouldn't light up.