HTML » Hex codes
There are millions of colors, and they all have their own hex code. We use hex codes to tell the browser what kind of color we want a "ting" to have, like the font, scrollbars, background, borders and a lot of other things. Here is a map over many colors, with their hex code:
You can also find the hex color in PSP or simular graphics programs. Check the psp – "hl purple and blue" tutorial to find out how.