Desaturate a System.Drawing.Color value

[Etienne Boucher]

Anyone has a quick way to desaturate a single Color value?

Etienne Boucher

 

[Jon Skeet [C# MVP]]

Anyone has a quick way to desaturate a single Color value?

How about:

double greyLevel = original.R*0.299+
original.G*0.587+
original.B*0.144;

if (greyLevel > 255)
{
greyLevel = 255;
}

Color desaturated = new Color.FromArgb((byte)greyLevel,
(byte)greyLevel,
(byte)greyLevel);

(The numbers there are taken from a web page, btw - they're supposedly
the NTSC standard weights.)

 

[Etienne Boucher]

Thanks Jon.

 

[Bob Powell [MVP]]

An alternative to Jon's solution would be:

int b=(int)(255*myColor.GetBrightness());
Color desaturatedColor=Color.FromArgb(b,b,b);


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