Gray will work as well. I have a 98 SR5 that came with the gray fob and had no problems with it. There is a sticky with reprogramming instructions at the top of the page.
Is it possible to get/order a key fob (with lock/unlock buttons) for a '98 SR5 (not limited). Thanks!
Toyota Parts - Genuine OEM Toyota Auto Parts and Accessories
Keyless Entry ECU Part #: 08190-00930
Keyless Entry Remote Part #: PT398-07100 OR 08191-00870
Hope this helps, let me know what happens
I found an ECU from a Toyota Camry - an RS3000 and it has the part #: 08190-00921
Slightly different numbers! the last two digits are different - 930 versus 921.