Abstract: A hair color stick (16) comprising a first cartridge (18) for holding a first hair color solution (20). A second cartridge (22) is for holding a second hair color solution (24). A structure (26) is for fluidly attaching the first cartridge (18) to the second cartridge (22), so that the first hair color solution (20) will mix with the second hair color solution (24). A facility (28) on the second cartridge (22) is for applying a controlled amount of the mixed hair color solution (20), (24) onto a portion of the hair (30) of a person (32), so that the hair (30) can be touched up with the mixed hair color solution (20), (24).