I have to mix some colors in a natural way. This means
blue + yellow = green blue + red = purple
And so on. I got the colors as RGB-Values. When I try to mix them I got the right "RGB"-results like
green + red = yellow yellow + blue = white
But not the right "natural-wet-paint"-results. Any good idea how to mix RGB in a natural way?
It would be great if someone knew a solution within the Microsoft.Xna.Framework.Graphics
namespace but a generic solution would also help :)
@Jay Bazuzi:
Please post a code sample that shows what you're trying to do.
Sure - this is my function for mixing the two RGB-Colors.
public Color colorMixer(Color c1, Color c2) { int _r = Math.Min((c1.R + c2.R),255); int _g = Math.Min((c1.G + c2.G),255); int _b = Math.Min((c1.B + c2.B),255); return new Color(Convert.ToByte(_r), Convert.ToByte(_g), Convert.ToByte(_b)); }
What I have read so far in this thread is very promising - I will convert C1 and C2 to Lab*, mix them - convert it back to RGB and return that color.
Red and blue make purple, red and yellow make orange, and yellow and blue create green. The shade will be determined by the proportions or ratios of each primary color that you use in the mix. From here, you can start mixing secondary and primary colors to make tertiary colors.
In the absence of light of any color, the result is black. If all three primary colors of light are mixed in equal proportions, the result is neutral (gray or white).
If you mix red, green, and blue light, you get white light. This is additive color. As more colors are added, the result becomes lighter, heading towards white. RGB is used to generate color on a computer screen, a TV, and any colored electronic display device.
"Natural wet paint" is a little ambiguous; the mixing of CMYK as suggested won't work because you're still adding colors.
If you want results like in Photoshop (as Jon B checked) you need to use L*a*b* space. Formulas for converting RGB to/from Lab and a description is here.
Lab space was specifically designed so that linear changes correspond to what the human eye perceives as a certain amount of color change. This is important because e.g. we are more sensitive to green than other colors, because we perceive changes differently depending both on hue and lightness, etc..
Trying any other methods currently being suggested will not only result in colors you don't want, but also won't represent a "constant-looking" change in color, especially if you use this for something where constant-change matters like a gradient.
You get cmyk<->rgb conversion for free with WIC. but it's .NET 3.0 only
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