Professional Development Committee, Spring Technology Workshop
The Elements of Creating a Web PageHomePreviousNext

Introduction

Planning

Whole site design

Page design

Color and Graphics

  • Formats
  • Browser safe color
  • File size
  • Using GIFs
  • Image maps

    Implementation

    Promotion

    Innovation

    Site map


  • Color and Graphics Browser Safe Colors

    The 216 "safe" color palette
    Graphic files in GIF format are limited to a 256-color palette. But there are only 216 colors that are common to all Web browsers. These colors are referred to as the "browser-safe palette" because using them is the best way to insure that the colors of your graphics are rendered the same on every browser.

    Here is different presentation of the "safe palette" which includes the hexadecimal values for each color.

    Dithering
    Dithering is a technique for making an image appear to have more colors in its palette than it actually does. The colors of nearby pixels are changed to make the eye see them as a third color. A side effect of this is that the graphics have a grainier, speckled look. If you web graphic uses colors that are not part of the 216 "safe palette," chances are that your monitor will dither to approximate the image's color.

    Color on the Web links

    RGB Color Chart http://www.phoenix.net/~jacobson/rgb.html


    Comments? Contact:
    Scott Britton, or
    Martin Hollick, or
    Julie Wetherill
    Copyright 1998, Harvard University. All rights reserved. Revised March 1998TopPreviousNext