Perhaps that was meant to be "How do" not "Who".
In that case, red supergiants "die" as a supernova, leaving behind a neutron star or black hole.
Blue Giants or Super Giants
If you mean "color", they are red (no surprise there, then).
The stars that are like supergiants are called "red giants" or "red supergiants".
The giants team colors are red and white. :)
Well light wise the highest category would be blue giants, red giants, and super red giants.
Red
All stars eventually turn into Red Giants or Super Giants
Red and white
Yes the Giants will be wearing red, white, and blue.
A star might begin to die after its main sequence. It'll balloon to a very big size. They're called red giants because the star is big and red. A red giant can die, though. Red giants die when their surface sheds into a cloud called a planetary nebula. Its core becomes a white dwarf. Our sun will go through this path.
white jersey with red numbers
No, red supergiants are cooler than the Sun. Despite their larger size, red supergiants have lower surface temperatures due to their increased surface area, resulting in a more reddish hue compared to the Sun's yellow color.