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Kelvin to RGB Converter: Color Temperature to HEX

This free converter turns a color temperature in Kelvin into the matching RGB and HEX color. It is useful for light bulbs, photo white balance, video and screen night modes.

By Debmedia Technologies LLP · Kolkata, India · Updated

What Is It and When Do You Need It?

Color temperature sorts light from warm to cool. Light bulb packs print it in Kelvin, photographers set white balance by it, and phones use it for night mode. A conversion to RGB lets you preview the tint on a screen.

Enter a temperature and the tool returns the matching color as RGB and HEX with a swatch.

How to Use This Tool

  1. Type a temperature between 1,000 and 40,000 K.
  2. Press Convert.
  3. Copy the HEX or RGB value.
  4. Compare it with the typical-sources table.

How the Calculation Works

The conversion follows a piecewise approximation of the black-body locus. For temperatures up to 6,600 K, red is full and green rises with a logarithm; above that, red and green fall with a power law while blue stays full. Results are clamped to the range 0 to 255.

Worked Example

2,700 K, a warm bulb, gives about #FFA757. 6,500 K, daylight, gives a near-white #FFFEFA. 10,000 K gives a cool blue #CADAFF.

Common Uses

  • Previewing bulb and LED colors.
  • Video and photo white balance.
  • Night-mode screen tint.
  • Lighting design.

Tips and Common Mistakes

  • Lower Kelvin means warmer, more orange light.
  • Real bulbs vary, so use a swatch as a guide only.
  • Daylight bulbs are usually 5,000 to 6,500 K.

Next, you may need the color converter, color name finder, color mixer, random color generator.

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Frequently Asked Questions

It describes the color of a light source by comparing it with a glowing black body at a given temperature in Kelvin. Low values are warm and orange; high values are cool and blue.
A candle is about 1,900 K, a warm white bulb 2,700 K, daylight 5,500 to 6,500 K, and an overcast sky 7,000 K or more.
It uses a widely used polynomial approximation by Tanner Helland, accurate for typical lighting from 1,000 to 40,000 K. It is a good guide for screens, not a lab measurement.
The unit is the same, but here it names the color of light, not how hot the bulb is.

Disclaimer: results are calculated in your browser from the numbers you enter. Check important results before you rely on them for money, health, safety or legal decisions.