Class

Colour

Intervall of temperature (°C)

 Exemples

0

Blue

40.000-25.000

Zeta Puppis

B

Blue

25.000-11.000

Spica, Regulus, Rigel

A

White-Light Blue

11.000-7.000

Sirius A, Vega, Deneb

F

White

7.500-6.000

Polaris, Procyon, Canopus

G

White-Yellow

6.000-5.000

Sun, Alpha Centauri, Tau Ceti

K

Orange

5.000-3.500

Epsilon Eridani, Arcturus, Aldebran

M

Red

3.500-3.000

Antares, Betelgeuse, Bernard's star