[telewriting]

Color in a painting behaves quite differently than color on the screen. When dealing with a monitor we are looking at additive color, when looking at a painting it's subtractive. The more color I add on the screen the brighter the color becomes e.g., RGB 255 255 255 would be white. The more paints I mix together, the darker the color becomes.

The color wheel given doesn't describe additive color relationships. In RGB land, the complements for the primaries are generally given as follows: red cyan, green magenta, yellow blue. Please see http://en.wikipedia.org/wiki/RGB_color_model

The reason that green and red "pop" is because we have the largest number of red and green cone cells in the fovea, that area of the eye responsible for our most central vision. Colors are not by default "cool" or "warm" they are only such in relation to context. We could have a "cooler" blue next to a "warmer" blue.