Shine In Yellow out? neutralizes yellow stains and brightens hair of all colors. There are benefits for both horse and human. Shine In Yellow Out? takes yellow stains out of hair and gives dull hair of every color a more brilliant sheen. It leaves hair silky, shiny and smelling good. Apply to wet hair, massage in until blue suds turn white. Soak for two to five minutes, then rinse well before repeating, if necessary.