Color temperature for light bulbs is measured on the Kelvin scale. LED Bulbs come in a variety of colors, but the most common are in a range from 2700K to 6500K. The general rule is WARM (2700K) to COOL(6500K+). The warmer the light, the more yellow tones, the cooler the light, there are more blue tones.
Here are the typical range of color temperatures
2700-3200 – WW – Warm White
4000-4500 – NW – Natural White
5000-6500 – CW – Cool White