Shedding light on Blackbody Radiation

Was there ever such a terrible name given to a phenomenon?

The art teacher tells them that if they mix all the colors, it winds up black.  But I tell them white is all the colors mixed together.  What gives?
White is the equal stimulation of all three cones in your eye.  So firing all the colors at once into your eye is indeed what white is. Black is the absence of stimulation - so no color.
When you say something has a color, you probably don't mean it.  Unless it glows in the dark, what you mean is that that the object reflects that color.  A red shirt in the dark does not look red - it looks black, it only looks red if there is some some red in the light striking it so it can reflect red.  So, when you mix all the "colors' in a painting or drawing, everything gets absorbed and nothing gets reflected and it looks black.

Blackbody radiation is what physicists call looking at something's actual color.  Rather than looking at the reflected colors, we look at the emitted colors.  Your blackbody radiation peaks out in the infrared because of your body temperature.  The fire in the fireplaces peaks out in red. Anything hotter than a few 100 degrees does not have a blackbody radiation spectrum that is black!

So a red shirt is not red, white light does have red in it, and the blackbody radiation of a fire is actually red.