I dyed my bleached blonde hair to Ferria cool brown, now it is gray. Should I strip my hair color before trying to color it again?

Hey I'm no expert,but my girlfriend has been struggling with her hair for about 3 years :/ if this is the first time you've dyed your hair then ignore this, but if you dye your hair a lot I would recommend you to grow it out please --> my girlfriend no longer has her natural colour... I would also seek advice from a hair dresser (phone them up if you are embarrassed about going out with grey hair) -- good luck.

I have bleached blonde hair and tried to dye it Ferria cool brown. But now my hair is gray... I need to change it back ASAP. Should I strip my hair color before going back to light blonde?