RYB color model
From Free net encyclopedia
RYB is a historical set of subtractive primary colors. It is primarily used in art and art education, particularly painting. It predates modern scientific color theory and does not correspond to the peak responsivities of the trichromat cone cells.
Color Wheel
RYB also makes up the primary color triad in a standard color wheel. The secondary colors VOG also make up another triad. Triads are formed by 3 equidistant colors on a particular color wheel. Other common color wheels include the light model and the print model.
Problems
The RYB space receives criticism for not being able to produce all perceivable colors. In particular, several bright shades of Green, Cyan, and Magenta are not producable from any combination of Red, Yellow, and Blue (and are conspicuously absent from the RYB color wheel).
This incomplete coverage furthermore produces an overall bias to the color space. On the color wheel one can see that the RYB primary colors Red, Yellow, and Blue, are complemented by the secondary colors Green, Purple, and Orange respectively. In an accurate color space mixing a color with its complement would produce a neutral shade of gray. However mixing any primary color with its complement (such as Red and Green) in RYB produces a shade of brown. This is demonstrative of the brown bias of the RYB space.
See also
- Color
- Color space
- RGB color model commonly used for color monitors
- CMYK color model for color printing and pigments
- HSV color space (hue, saturation, value)
- HLS color space (hue, lightness, saturation)
- RYB color model the traditional color model used by artists.
- YUV for PAL television
- YIQ for NTSC television
- L*a*b* (absolute color space)
- color solid
- color theory
- List of colors
- additive color
- subtractive color
- primary colors