/cgl/ - Cosplay & EGL

How do i dye a synthetic wig blonde?
It's a dullish brunette/brown color, i got it to match with my real hair but it just kinda doesn't fit with the rest.
I want it to be a brilliant blonde like picrel, i also want it to have a bit kf a gradient from top to bottom, with bottom being pure blonde and it getting slightly more brown as it goes to the top, is that a possibiltiy or do i just have to go with solid color?
Do i just dye it like regular hair or is there some catch?