Web Design in a Nutshell, 3rd Edition

Matching Web Colors

In the course of designing web pages, it is common to need to match the color of a graphic to an adjoining graphic, a background graphic, or an HTML color. Unfortunately, matching colors on web pages is not always possible due to the way monitors and graphic formats tend to slightly shift RGB colors. Even graphics and HTML elements with identical numeric RGB values will not necessarily match perfectly, as explained in the following scenarios.