Hi, I'm hoping for some advice please.
I always colour my hair with nice and easy semi permanent but accidently bought a permanent one,it's a nice colour,just like what i usually use but should i return it and get the semi? what's the difference? will i get a very obvious re-growth line? (i have grey roots...shhh don't tell anyone!) i'm thinking instead of a gradual fade out i will get a more obvious line...help!!!