Algorithm for natural mixing of two colors?

Question

Java

Given: two RGB colors. You need to mix two colors and show the result. For example Blue + Yellow = Green.
I understand mixing RGB and CMYK does not give realistic results. I saw a mention of Kubelka and Munk on the net, but I could not find examples of implementation or an intelligible description anywhere.

Answer 1

Like on canvas - it's not RGB, it's RYB
Google can easily find how to convert from RGB to RYB

Answer 2

Linear interpolation over Hue in HSV? Works with blue and yellow.

Answer 3

Averaging won't work?
R = (R1 + R2) div 2
G = (G1 + G2) div 2
B = (B1 + B2) div 2

Answer 4

The question is about C# , but porting to Java will not be difficult.

Answer 5

a - alpha from 0 to 1
R= R1*a + R2*(1-a) - if we set transparency
, it is not clear what is not to like in the "realism" of blending?