You'd create custom colors.
Web-safe colors are in 20% increments: 0%, 20%, 40%, 60%, 80%, 100%
Written on the RGB 100 scale: 0, 20, 40, 60, 80, 100
Written on the RGB 255 scale (which Kuler uses): 0, 51, 102, 153, 204, 255
Written on the HEX scale: 00, 33, 66, 99, CC, FF
Create a custom color using any combination. For example, a Web-safe, sky blue is: R51, G153, B204. The same color in HEX is: R33, G99, BCC.
There are 216 possibilities.
Before & After magazine
There isn't much of a need to worry about websafe colors these days - most everyone has monitors that support thousands or millions of colors. But if you really need websafe colors, and you have Illustrator CS3 or CS4, you can use the Recolor Artwork feature to automatically convert a group of colors to their closest web-safe equivalents.
Thanks so much for your answer, I was really worried about it.
Hello John, Thanks for your answer!