My photos, edited in Photoshop CS appear fine when I do them in
photoshop, but when they are published to the web they appear very
dark on some computers, but still look OK on others.
Each platform, Windows and Macintosh, has a default set of 256
colors, called the system palette, that is representing 24-bit
images. Web browsers such as Netscape and Microsoft Explorer will
force an image - dithering it as necessary into their own 8-bit
palettes, which are different from the host palettes. Also Windows
and Mac browser palettes are different - they share only 216 out of
The 216 colors that are shared between the browser palettes won't
dither from platform to platform. Therefore, you should use these
colors for your Web graphics
you can find on the net and download this nondithering palette for
Mac or Windows, load it into the Photoshop Swatches palette to use
in your work.