Answer:
Youcannot make yellow color because it's a primary colour.There are 3 primary colous:magenta(a kind of red),blue,and yellow.Then you have the 3 complementary colours:green,orange and violet(this last 3 can be create with the primary colours:yellow+blue=green;blue+magenta=violet;magenta+yellow=orange)
Do I really have to do this again? You people need to research this before answering.
There are two kinds of color mixing, additive (light) and subtractive (paint). In additive the primary colors are Red, Green, and Blue because if you split a beam of light you get those colors. That's why your computer's colors are based on the RGB (Red, Green, Blue) color model, because your computer screen is just different colored lights. If you combine Red and Green and go down far enough in equal amounts you get Yellow, this is how you get this color on a computer or anything else involving light. So the RGB code 255, 255, 0 is Yellow, because it has 255 Red, 255 Green, and 0 Blue.
In subtractive (paint), Yellow is so far in between Red and Green that you can't get to it through mixing paint so this results in Brown, which is basically a darker Yellow.