Netscape color palette

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Netscape color palette

A palette of 216 colors that render the same on all computer hardware. Also called a "Web-safe palette," the palette was selected by Netscape in the early days of the Web when many computers were unable to display more than 256 colors. Today, most computers support 16.8 million colors; however, the palette is still often used for absolute compatibility.

Where the 216 Came From
Giving red, green and blue (RGB) equal weight, the 216 comes from 6x6x6, which is the largest number cubed that goes into but does not exceed 256. The 256 colors were divided by 6, yielding hex 00, 33, 66, 99, CC and FF, and any combination of R, G and B with these values produces a Web-safe color.
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Visit http://www.InternetTG.org/newsletter/mar99/accessibility_color_challenged.html This site has a colour chart which shows the different colours a user would see based on a web safe palette. In general, an overall recommendation would be to seek out professional guidance to help you achieve a satisfactory result for all users to the site.
This latest new release also added Java support and the dithering feature with additional options to accommodate Web Safe palette.
There are a couple of sites which will help you achieve your goal: http://more.btexact.com/people/ rigdence/colours/ and http://www.InternetTG.org/ newsletter/mar99/accessibility_ color_challenged.html The TG site has a chart which shows the different colours a user would see based on a web safe palette Mal MacKenzie, T34 Design