CSS HEX Colors
In CSS, a color can be specified using a hexadecimal value in the form:
Where rr (red), gg (green) and bb (blue) are hexadecimal values between 00 and ff (same as decimal 0-255).
For example, #ff0000 is displayed as red, because red is set to its highest value (ff) and the others are set to the lowest value (00).
Experiment by mixing the HEX values below:
Shades of gray are often defined using equal values for all the 3 light sources: