A semi-permanent color or Level 1 color is convenient for coloring your hair at home, by experimenting with new shades easily. Such a color can enhance natural color or modify it a bit, color your manes darker, deliver special effects such as lowlights on darker hair, and blend gray by giving those strands a lighter shade of the desired color. However, a semi-permanent color is not for lightening hair color, modifying to a completely different hair color, or for coloring more than 50% gray. It is ammonia free, has no peroxide at all unlike demi-permanent colors, lasts for 6-12 shampoos, and is gentler than several demi and permanent dyes. Clairol and L’Oreal are certainly a few best brands to offer such dyes.