Colour Picking

Hello,

Yesterday I was working on a website, and came across this problem:

I needed to pick a few colours which should be equally bright. RGB couldn't help, but neither could HSL. A yellow with maximum L(uminance) is much brighter than a red with maximum L. Pink is brighter than red, but darker than yellow, etc. So, I ended up with choosing the plain visual method of picking random colours, bringing them side to side and see whether they match.

I would like to find though a more secure and easy way to do it. Anyone has any information/ideas/links?

Thanks a lot in advance,

Ken

#330468

Hmmm... the way the eyes and brain work...

Yes, certain hues are percieved brighter than others.

You'll probably also notice that the area of the color spectrum percieved as "green" is a lot wider than other colors.

It's a baffling thing, really.

I reckon the absolute best way is to do things by experimentation.

#330480

This is something I found:

"Most programs have a formula where the software takes proportions of each of the three channels and mixes the tones to give a final grayscale image. In Photoshop, the conversion factor is 59% of the green, 30% of the red and 11% of the blue channel for conversion to black-n-white"

from http://www.naturephotographers.net/article...3/dw0103-1.html

A safe way to pick two colours with the same brightness would be to compare their grayscale equivalents, where only luminocity matters (not hue or saturation). If only I could find any colour maps anywhere...

#330668

Try some HSB pickers. Corel Graphic Suite does have it.

#331267