If you want to find it using hex editing then jaosming has a video tutorial using the hex on steroids tool. Just multiply by 255. Find the correct colors you want using the rgb scale and then divide by 255
If you want to edit ccourt colors then you will need the hex on steroids tool. After that, create a profile( just copy Jao's profile in is tutorial) then after that, open the .iff file that you want to edit.