It has to do with our brain interpretation of the visual stimulus and how our eyes perceive and communicate to the brain the image of the light spectrum that is visible. Red things are red because of the specific spectrum of light that is being reflected from the item and our eyes' (and brain's) interpretations of that visible spectrum. For example, a matt finish black item reflects back no light, therefore looks black, but white colors reflect back all the light, therefore are seen as white (a mix of a full spectrum of colors reflected is perceived as white). Red colors only reflect back the red light, and absorb the other colors in the spectrum, so they are not visible to our eyes.
Interesting tidbit:
Very recent studies have indicated that different individuals see colors differently and in some cases, so do groups of people, such as a specific tribe of people who participated in one of the studies. That tribe not only has no word in their language for the color blue, they also can discern no difference between the color green and the color blue when side by side. As indicated above, these are very recent 2012 results and more is still being studied based on these results about how we see color. It is becoming more likely that our brain has as much or more to do with our sensing of color than our eyes. Keep an eye out for more results on this interesting new finding.
The color of a red bus is red because it is a "red" bus!
Red wine can differ greatly in color, from a purplish red to a blood-red to even a brownish color. The color of a beet is very slightly purple, but mostly a dark red. This is similar to the common conception of the color of red wine. Therefore, you could say that beet red is similar to a red wine color.
if you mean what color do you mix together to get red, you can't. Red is a primary color.
red is her favorite color red is her favorite color
Red is at the top of the color wheel because red is the first color in the visible spectrum.
Red is a primary color.
Rubies are red in color.
red
red
red is her favorite color red is her favorite color
a red orange color or possibly an orange red color depending on how much of each color u put in
The resulting color will be a red-violet.