Hover the mouse left of "World of Warcraft Acctounts" when the popup comes up, dont try to get the color from the account names. The reason for actually get the color from this stage is so we ASAP can detect mltiple bnet accs, not to actually select the right one.
So Fire up wow, input the acc name and PW, login and when the question about which account to login with, run the Main.exe, hit settings, load the "profile", go to tab 4(or where the color settings is) and press button 2. Now hoover some pixels to the left of "Accounts" in the pupup, and find a yellow pixel, and then click it.
Explained a couple of times now, hope I could make it clear enough.
Alltho I warn you mate, the relogger could be cactus for everyone, but if yure lucky it could work.
Good luck