Color Temperature Converter (Kelvin to RGB)
See what color a light bulb’s Kelvin rating looks like — 2700K warm white, 4000K neutral, 5000K daylight — as RGB and hex values.
How to use the Color Temperature Converter (Kelvin to RGB)
- Enter a color temperature in Kelvin (1,000–40,000 K).
- See the approximate color, RGB and hex.
- Use the guide to pick bulbs for each room.
How it works
Color temperature describes the color of light by comparing it with an ideal glowing “black body” heated to that temperature. Lower values look warm and orange; higher values look cool and blue. The RGB values use Tanner Helland’s widely used curve fit to black-body colors. Note that a “warm” color has a lower Kelvin number — the opposite of everyday temperature.
Popular color temperature conversions
- 1800K color temperature
- 2000K color temperature
- 2200K color temperature
- 2400K color temperature
- 2500K color temperature
- 2700K color temperature
- 3000K color temperature
- 3500K color temperature
- 4000K color temperature
- 4500K color temperature
- 5000K color temperature
- 5500K color temperature
- 6000K color temperature
- 6500K color temperature
- 7000K color temperature
- 8000K color temperature
- 10000K color temperature
Light bulb color temperatures
| Kelvin | Name | Typical use |
|---|---|---|
| 1,900 K | Candlelight | Ambience |
| 2,700 K | Warm white | Living rooms, bedrooms |
| 3,000 K | Soft white | Kitchens, dining rooms |
| 4,000 K | Neutral / cool white | Offices, garages |
| 5,000 K | Daylight | Workshops, reading |
| 6,500 K | Cool daylight | Displays (D65), task lighting |
Frequently asked questions
What color is 2700K?
A warm, yellowish white similar to incandescent bulbs.
Is 5000K daylight?
Yes — 5000K is neutral daylight; 6500K is a cooler, bluish daylight.
Which color temperature is best for sleep?
Warm light below about 3000K in the evening is less likely to disturb sleep.
Why is warm light a lower Kelvin?
A black body glows red-orange at lower temperatures and bluish-white when much hotter.