html 216 standard colors hexadecimal code:
sorted by b (blue) values or sorted by r (red) values

On this page you will find a table of RGB (Red/Green/Blue) hexadecimal coded color that are supported by most browsers.

Colors may also be specified by six-character codes representing their relative RGB (Red/Green/Blue) values, where the possible values for each color component are 00, 33, 66, 99, CC, and FF.

HTML specifications identified color in RGB (Red/Green/Blue) hexadecimal code for use in an HTML attribute. These have become the sixteen named colors that can be used by name to define color in HTML and now in Cascading Style Sheets (CSS).

The six charts can be visualized as a cube composed of 216 cubelets; the total cube has six layers of thirty-six cubelets; each cubelet is a unique color. Using this metaphor, black (#000000) in the lower left of the first chart is one corner of the cube and white (#FFFFFF) in the upper right of the last chart is the opposite corner of the cube; the cubelets running through the body of the cube in a line from black to white comprise the gray scale.

The six charts below display the 216 possible colors in the Netscape/MSIE palette with their hexadecimal RGB codes (a seventh chart displays the gray scale). In each chart the blue value is constant, the vertical axis represents increasing red values, and the horizontal axis represents increasing green values.