The
color index is a numerical expression that determines the color of a star that gives its temperature.
- Blue > 30,000 Kelvin. > 30,000 L
- Blue to blue white 10,000 -> 30,000 Kelvin. 25 -> 30,000 L
- White 7,500 -> 10,000 Kelvin. 5 -> 25 L
- Yellowish White 6,000 -> 7,500 Kelvin. 1.5 -> 5 L
- Yellow 5,200 -> 6,000 Kelvin. 0.6 -> 1.5 L
- Orange 3,700 -> 5,200 Kelvin. 0.08 -> 0.6 L
- Red 1,000 < 3,700 Kelvin. <0.08 L
- Brown < 1,000 Kelvin
- Black 0 Kelvin
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