Question

Cooler stars appear to be what color? ​

Answer 1

Answer:

red

The colour that we see is usually an additive combination of the emissions from each wavelength. Hot stars appear blue because most energy is emitted in the bluer parts of the spectrum. There is little emission in the blue parts of the spectrum for cool stars - they appear red.

Answer 2

Answer:

redder

Explanation:

Cooler stars emit more of their light at longer wavelengths and so appear redder; hotter stars emit more of their light at shorter wavelengths and so appear bluer