3 ms·
Re: color — it's not just restaurants. Board games, card games, Google/Microsoft/other logos, etc. also use 4 colors. Why? Opponent-process theory (https://psy
by amitp 7y ago
Re: color — it's not just restaurants. Board games, card games, Google/Microsoft/other logos, etc. also use 4 colors. Why?
Opponent-process theory (https://psyc.ucalgary.ca/PACE/VA-Lab/colourperceptionweb/theories.htm https://psyc.ucalgary.ca/PACE/VA-Lab/colourperceptionweb/the...) says that the eye converts the three wavelength inputs into six orthogonal axes (dark-bright, yellow-blue, red-green). From these axes we get the four primary colors: red, yellow, green, blue. Of course things are never so simple. There are various attempts to measure the perception of color (https://www.handprint.com/HP/WCL/vismixmap.html#ncs https://www.handprint.com/HP/WCL/vismixmap.html#ncs), and none of them place red-yellow-green-blue exactly along the axes.
- Kaibeezy 7y ago“Four primary colors” is bugging me like a 4-sided snowflake. Can we agree: Additive - RGB Subtractive - RYB / CMY I found this bit in the Wikipedia article interesting / relevant: Thus for trichromats like humans, we use three (or more) primaries for most general purposes.[25] Two primaries would be unable to produce even some of the most common among the named colors. Adding a reasonable choice of the third primary can drastically increase the available gamut, while adding a fourth or fifth may increase the gamut but typically not by as much.