The very conventional search form for the site I work on has six colors that are obvious including the white background.
I am looking at a picture of an anime character (Kizuna Ai) on my wall and it has two shades of five colors plus one shade of blue used in the background for a total of 11 shades.
I am looking at a picture of an anime character (Kizuna Ai) on my wall and it has two shades of five colors plus one shade of blue used in the background for a total of 11 shades.