A collection of color science related tools available
online since 1999
- 1931 CIE Diagrams
remain the commonly accepted language (not necessarily the best one) to describe
- Color Vision Test
is an online test based on
. It tests different types of color vision deficiencies: tritanopia - blue
blindness which is very rare, deuteranopia - green blindness, protanopia -
red blindness. The latter two are more common and difficult to distinguish
from one another by quick test such as this one.
- Copunctal Points are essential
for creating confusion lines for dichromats (people who have only two types of cones
instead of three that normal people have). Each type of dichromat has a copunctal
- Confusion Lines are the lines
in a color space such as CIE chromaticity diagram on which colors are not distinguishable
for corresponding dichromats. Each type of dichromat has its confusion line.
- Spectral Curves compare two sets of spectral
curves (e.g. color matching functions, cone fundamentals).
- Color Space explains color space and the rationale behind using CIE 1931 color
space on this site.
- Color appearance simulation expresses a view on color apperance simulation and
poses some questions about the current technology in this area.
- Benham's Top is one of the interesting subjective color phenomena.