what is 'coulume', and what the crap are you trying to do?
what is your natural color level? are you lightening it, or darkening?
trying to go blonder? or just knock off the ash tone?
btw, the sun does not 'ash' haircolor'..you probably have chemical damage. if anything, the sun lightens or fades natural/chemical-altered haircolor.
no matter what you are trying to do, simply adding 'a few drops' of a 2-levels darker shade won't do a thing. also, you may have different needs from root (most likely) to ends. therefore, any change in formula is not going to fix the entire issue. you may need two different formulas to address different issues of sun-damage/fading.
at 1:01 PM on Aug. 11, 2012