The hottest color of a star is blue, which exceeds temperatures of 30,000 Kelvin. Blue stars emit more energy and have higher surface temperatures compared to red or yellow stars. The temperature of a star is closely linked to its color, with blue indicating extreme heat. ;
The hottest color of a star is blue, which exceeds temperatures of 30,000 Kelvin. In comparison, red stars are the coolest, while yellow stars are intermediate in temperature. Thus, the answer to the question is D. blue.
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