Generally yes.
However, there is is a hypothetical black dwarf that has no heat at all, and thus is black.
See related question
The coldest stars are the red dwarves. Anything colder than that would be a "brown dwarf", which is no longer really a star.
It depends on your interpretation of what a star is:The coldest star on the main dequence is a red dwarf.The coldest star off of the main dequence is a red giant.The coldest stellar remant is a black dwarf.However, there stars that cannot fuse hydrogen, but emit light: They are:Brown dwarf < 2,000 oKMethane dwarfs < 1,300 oKSub Brown Dwarfs < 600 oKBlack dwarf 2.3 oK - although none have been observed - See related link.
A black dwarf star is the coldest. See related question.
Lomuos
No. Red giants have temperatures comparable to those of red dwarfs. Even cooler are brown dwarfs, which are objects that are in the intermediate range between planets and stars.
The color of fire that is the coldest is red.
Black - Blue. Black stars have cooled off completely (some are huge hunks of carbon (diamond!). Stars that are progressively warmer are brown, red, orange, yellow, then blue, blue-white are the hottest.
White, blue, red, orange, from hottest to coldest
The temperatures of stars from hottest to coldest are blue stars, white stars, yellow stars (like our sun), orange stars, and red stars. Blue stars can have surface temperatures exceeding 30,000K, while red stars typically have surface temperatures around 3,000K.
The hottest stars are blue and the coldest stars are red because blue is the color made by hotter burning things and red is the colest burning color.
The hottest stars are blue and the coldest stars are red because blue is the color made by hotter burning things and red is the colest burning color.
Small red stars are called red dwarves. They are the least luminescent and coldest stars.