Can you use Color Oops and then use bleach right after to lighten your hair?

Yes, you can. Colour Oops lacks ammonia and bleach, the two chemicals that damage your hair, so it would be like bleaching your hair once even though you've lightened your hair twice. worked well for me (fire-engine red to platinum blonde, very thick hair)! i used clairol's nice 'n' easy born blonde ultimate blue the day after i used colour oops and there was minimum damage.