As a validator, it does many valuable tests, but it does not test links. Colors Colors can be used in HTML code for backgrounds and various texts. Using color is a simple, effective way to spice up a Web page. There are 16,777,216 possible color combinations. However, the Web can only handle 256 non-dithering colors , so when creating color backgrounds and foregrounds you need to be careful what colors you use.
Numerical labels come in decimal and hexadecimal forms.
You will need the hexadecimal numbers for HTML coding. Carnegie Library of Pittsburgh's Javascript Color-Safe Browser Checker lets you click on the radio buttons to investigate color combinations. Victor Engel has another good No Dither Netscape Color Palette . Realm Graphics , from Ender Designs, is an excellent resource for graphics with backgrounds, bullets, buttons, lines, and other icons. Ron Leishman's The Clip Art Connection has multiple collections and thousands of images.