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I'm trying to figure out the math in a python program im creating that can simulate mixing paint in real life, but I cannot find any info about any CMYK equations on the internet.

Here's an example of what I need to do...

If the CMYK value of Paint Bucket A is (C=10, M=20, Y= 60, k=10)

and the CMYK value of Paint Bucket B is (C=30, m=60, y=100, k=15)

and these two paint buckets were mixed together, what would the CMYK value be of the resulting bucket, and how could I figure that out mathematically?

Also, say Bucket A has twice as much paint as Bucket B, how would that change the equation? And also, what if say three different buckets were mixed together?

First I thought averaging each value together would work. For example if I mixed (0,100,0,0) with (100,0,0,0) and that would give me (50,50,0,0) But then I thought "basically that's mixing pure cyan with pure magenta and it should create" (100,100,0,0)

So I guess the reason it's complicated for me is because the percentages of each color don't have to add up to 100. Any ideas or hints?

jowncluthber
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  • Does this answer your question? [CMYK + CMYK = ? CMYK / 2 =?](https://stackoverflow.com/questions/1527451/cmyk-cmyk-cmyk-2) – Jesse Apr 22 '22 at 18:14
  • I don't think those equation work, because let's say you add paint A = 100,100,0,0) with paint B = (0,100,100,0). If my math is right, their equation would give me (100,100,100,0). But in reality if you mix paint A =(1 Cyan, 1 Magenta) and paint B = (1 Magenta, 1 Yellow), shouldn't it equal a paint that's (1 Cyan, 2 Magenta, 1 Yellow), not (1 Cyan, 1 Magenta, 1 Yellow)? – jowncluthber Apr 22 '22 at 18:46

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