how mix color in opengl

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any body tell me how mix color
1:for ex if i want dark magenta value how this
i know the magenta gcolor3f(1.0,0.0,1.0)

2:again iwant get dark red color vaule
gcolor3f(1.0,0.0,0.0) this for red

Posted 1-Jun-13 9:51am

beeko123

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Nelek 1-Jun-13 16:03pm

Ehhmmmm... what?

2 solutions

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nv3 · Answer 1 · 2013-06-02T01:29:00

If you want a darker variant of an existing color, just lower all R,G, B values proportionally. For example, to darken the magenta color (1.0, 0.0, 1.0), multiply all components by say 0.5 and you get (0.5, 0.0, 0.5).

An good method for experimenting with color values is to just open the Windows color dialog and see the effect of changing one ore multiple values. Also, experiment with different color systems, like HSI and see how they relate to each other.

Santhosh G_ · Answer 2 · 2013-06-02T02:16:00

Solution 2

The following logic can be used to get the dark version of a particular color.

fNewColorR = fColorR * fIntensity;
fNewColorG = fColorG * fIntensity;
fNewColorB = fColorB * fIntensity;

Dark version of a particular color can be achieved by a decreasing the value of fIntensity.

Posted 2-Jun-13 2:16am

Santhosh G_