This category includes color-enhancing shampoos and conditioners as well as rinses and toners. All of these products deposit a translucent layer of dye on the outside of the cuticle and generally wash out after one or two shampoos (though a few do leave a color residue). However, using them too often can result in buildup.Temporary colors are a good way to have a little fun, create interesting highlights, camouflage very small amounts of gray, or freshen up fading permanent or semipermanent coloring. Blue and purple rinses tone down yellowing in white hair and correct brassiness. Temporaries can be used on any hair type, processed or not; the results are more noticeable on blonde or red hair than on darker shades.