Problems Associated with the Use of Color to Represent Text.
There are several issues with using color to encode language.
  1. 10% of all males are color blind (less then 1% of females are color blind).
  2. Color memory is not very good in humans (or at least not well developed).
  3. Learning to “read” color text is difficult.
  4. Computers are not yet set up to easily represent accurate color.
  5. A great amount of light is needed to read color data from a printed source.
  6. Many colored pigments are not “light-fast” and so have a tendency to fade over time.
  7. Color changes depending on the color of the light used to view it.
  8. Colors interact with neighboring colors visually changing the appearance of each other.
  9. Color needs more surface area on a page to represent text than some traditional fonts.