Color Temperature to RGB Converter
Convert a colour temperature in kelvin to the light colour it produces, from warm to cool.
Warm and cool light as a colour
Colour temperature, measured in kelvin, describes whether a light source looks warm and orange or cool and blue. This converts a kelvin value to the colour of light it produces, useful for matching lighting, setting a mood in a design, or understanding what a bulb's rating means.
Enter a kelvin value to see its light colour.
The scale that runs backwards
Colour temperature is famously counterintuitive: lower kelvin numbers produce warm, orange light, and higher numbers produce cool, blue light — the opposite of how we talk about warm and cool. A candle or a cosy bulb sits low, around 2000 to 3000 kelvin; midday daylight is much higher, around 5500 to 6500. This matters in design and photography for setting mood — warm tones feel intimate and inviting, cool tones feel crisp and clinical — and for matching the colour of light in a scene. Understanding that the number runs backwards from intuition is the key to reading it, and seeing the actual colour a temperature produces makes it concrete.
Color Temperature to RGB Converter FAQ
Why does warm light have a lower kelvin number?
The scale is based on physics, where hotter objects glow bluer, so cool-looking blue light has a higher temperature than warm orange light — opposite to intuition.
What kelvin is warm versus cool light?
Warm, cosy light sits low, around 2000 to 3000 kelvin; cool, daylight-like light is much higher, around 5500 to 6500.
Is anything uploaded?
No. The conversion happens in your browser.