Hsv (also known as Hsb) is similar to Hsl. They're both based on cylindrical geometries, but Hsv is based on a "Hexacone" model while Hsl is based on a "Double Hexacone" model. Read more about the differences on wikipedia.
The Yxy color space expresses the Xyz color space in a different way, in terms of only x and y coordinates which allows for a 2d representation.
Color conversions performed using the open source ColorMine library.
Cool! Creating famous images from color palettes found in other images: http://t.co/H1OxefkOt0