If someone with dark blonde hair dyed it brown how long would the color last?

Question

I've eebn thinking about dying my hair brown lately.

my hair is this color: http://www.usmagazine.com/files/lc-split.jpg

Answer 1

It would last about 2 months depending how fast your hair grows...but when you go back to dye it again, just tell them to do the roots, that way your not overlapping the other color and frying your hair!