adding a 3rd non-fillable color

Hi,

I need to add a 3rd color which can not be filled. I presume that adding a 3rd color to the “borderColors” list in the Flood Fill script would be the best place to start, followed by the colors script. I am not a coder but can follow instructions. Example non-fillable color might be something just off from white; like (220, 220, 220). Can you help?

Thank you, Tom