Colorhexa.com provides a list of all named colors in English, in alphabetical order. The color names are shown on a background of the color they describe, and the Hex code for each color is also provided.
A list of Hex codes in numerical, then alphabetical order is also available at Colorhexa.com. The website also provides a search engine by color name or code, and other color resources for graphic designers, including how to create gradients and blend colors together. It also provides a converter from Hex to other codes, including R, G, B or Red, Green, Blue and C, M, Y K, or Cyan, Magenta, Yellow, Black.