Our yellow sun..........will become a red giant someday.....

Stars | Causes of Color - Webexhibits

www.webexhibits.org/causesofcolor/18B.html

The sun has a surface temperature of 5,500 K, typical for a yellow star. ... generated than in the main sequence, and the star expands to become a red giant. ... from infrared images, yellow from visible light, and green and blue from x-ray data.