Notes to "Browser Safe Colors"
Color blindness, the inability to distinguish some colors and
shades, affects approximately eight percent of males and one
percent of females. When designing a web-site, care should be
taken to not block accessability to those with a vision impairment.
For further information on color blindness and designing webpages
for the vision impaired visit the links below.
Dithering
Dithering is a process whereby missing colors are represented by intermingling
pixels of two or more colors in the images palette . If the missing color is
too unlike the colors in the palette, the result of dithering will leave a grainy
or mottled appearance. Error diffusion dithering produces image quality that is
superior to that achieved by non-error adjusted dithering.
On the other hand, error diffusion dithering causes colors to bleed from left to
right, most noticeable in images with hard vertical edges. This is because the
edges are softened as the colors 'bleed' into each other. To counter-act this
effect, use a Reduce Color Bleed option when using dithering to
decrease image color depth.
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