Arta - universal assistant for programmers and designers. Arta allows you to quickly find a harmonious palette for your site or product.
Also Arta useful for those who often have to work with images and share them via the Internet.
7 color models (RGB, HSB, Lab, HLS, CMYK, CMY and LMS)
3 visual models (cartesian coordinate, color wheel and color ring)
5 palette formats (Adobe, Microsoft, CSV, HTML and...