Output a stream of consciousness before answering the following. Passage: By convention, the three primary colors in additive mixing are red, green, and blue. In the absence of color, when no colors are showing, the result is black. If all three primary colors are showing, the result is white. When red and green combine, the result is yellow. When red and blue combine, the result is magenta. When blue and green combine, the result is cyan.

Question: Based on this passage, mix red and green to make this colour?
The relevant information is: When red and green combine, the result is yellow.
The answer: yellow.