Okay, so my hair was highlighted at the beginning of the summer. Naturally it's a sort of dark blonde. My friends and I tried to dye it auburn this evening with semi-permanent colour and, well, it didn't work.
Nothing awful happened. It isn't green with purple spots and I'm not bald. It's just... slightly darker than it was before, with a definite reddish tint in certain light, but it hasn't worked.
We're thinking of trying again tomorrow night but I don't want to do anything without consulting the powers that be - ie you lot 
Would it work, trying again? Should we use the same dye (we used one bottle but I have very long hair so there just may have not been enough?) or a permanent version? Or should we just not risk it? I can't afford to go to a salon to have it done, though I can pop in and ask them for advice obviously.
What say you?