| COLOR INDEX | SURFACE TEMPERATURE (K) | COLOR | FAMILIAR EXAMPLES | | B intensity/V intensity | B magnitude—V magnitude | | 1.3 | -0.31 | 30,000 | electric blue | | | 1.2 | -0.24 | 20,000 | blue | Rigel | | 1.00 | 0.00 | 10,000 | white | Vega, Sirius | | 0.72 | 0.35 | 7,000 | yellow-white | Canopus | | 0.55 | 0.65 | 6,000 | yellow | Sun, Alpha Centauri | | 0.33 | 1.2 | 4,000 | orange | Arcturus, Aldebaran | | 0.21 | 1.7 | 3,000 | red | Betelgeuse, Barnard's Star | |