In HTML, color or is represented as a hexadecimal value (e.g. #FF0000) or as the color name (red). Web safety color means that when running in 256 color mode, on both Windows and Macintosh systems, Displays the same color in Netscape Navigator and Microsoft Internet Explorer. The conventional wisdom is that there are 216 common colors, And any combines 00, 33, 66, 99, CC or FF pairs (RGB values are 0, 51, 102, 153, 204, and 255, respectively) hex values to represent Web safety color.

But the test showed only 212 Web safety colors instead of all 216, The reason is that Windows Internet Explorer does not render color #0033FF (0,51,255), #3300FF (51,0,255), #00FF33 (0,255,51) and #33FF00 correctly (51,255,0).

When Web browsers first set their appearance, most Calculator machines only display 265 colors (8 bits). Today, most number Calculator machines can display thousands of numbers or millions of colors (16 bit and 32 bit), so when you develop a site for users of the current Calculator system, There is absolutely no need to Use the browser safe palette.

one kind of case for using Web safe color palettes is to develop sites suitable for alternative Web devices such as PDAs and mobile phone displays. Many of these devices offer only black and white (1 bit) or 256 color (8 bit) displays.