HEX to Decimal Color
Convert a HEX colour to the integer forms Android, Java and Unity want.
Color Temperature Converter
Convert colour temperature in kelvin to an RGB colour.
The light
The colour
The colour appears here
Quick Tool Overview
The Color Temperature Converter turns a kelvin value into an sRGB colour using the standard black-body approximation, with a reference scale marking every common light source from candlelight to open shade.
- What it does
- Converts colour temperature to RGB and HEX
- You give it
- A value in kelvin, and an optional tint
- You get back
- The colour, with a reference scale
- Best for
- Lighting, white balance and warm-light overlays
About the Color Temperature Converter
Colour temperature describes the colour of a light source by the temperature a black body would have to reach to glow that colour. Low numbers are warm and orange, high numbers are cool and blue — which is the opposite of how people use the words warm and cool, and the source of most of the confusion around it.
This converts any kelvin value into an sRGB colour, using the standard approximation of the Planckian locus, and shows the whole scale from 1000K — candlelight — up through 2700K for a warm bulb, 5000K for midday sun, and 6500K, which is the D65 white point sRGB itself is defined against.
The reference scale is the practical part. Every common light source is marked on it with its temperature, so you can match a CSS overlay to a lighting condition, pick a bulb, or set a white balance and understand what you are setting. A tint control is included too, for the green-magenta axis that fluorescent and LED sources sit off, which temperature alone cannot describe.
Key features of the Color Temperature Converter
A reference scale
Candlelight, tungsten, daylight and overcast all marked with their own temperatures.
The naming explained
Why 2700K is called warm despite being the lower number, which confuses everyone once.
Tint axis included
The green-magenta direction that fluorescent and LED sources sit off, which temperature alone cannot describe.
Standard approximation
The widely used piecewise fit to the Planckian locus, accurate across 1000K to 40000K.
CSS ready
The result as HEX and RGB, for warm-light overlays and filters.
How to use the Color Temperature Converter
-
1
Set the temperature
Drag from 1000K to 12000K, or type a value.
-
2
Read the colour
The sRGB and HEX equivalent, with a live swatch.
-
3
Compare with the scale
Every common light source is marked with its own temperature.
-
4
Adjust the tint
The green-magenta axis, which temperature alone does not cover.
Frequently asked questions
Because the words describe how the light feels, not the physics. A low colour temperature is orange, which we read as warm; a high one is blue, which we read as cool. The physical temperature runs the other way.
It depends on the sky. Direct midday sun is around 5000–5500K, an overcast sky is 6500–7500K, and open shade under a clear blue sky can reach 10000K. The 6500K figure quoted as daylight is the D65 standard, which is an average.
2700K for living spaces, which matches the incandescent light people find comfortable. 3000–4000K for kitchens and workspaces. 5000K and above reads as clinical indoors, though it is right for a photography or colour-critical space.
It uses the widely adopted piecewise approximation of the black-body curve, accurate to within a few units across 1000K to 40000K. That is more than enough for design work and not intended for colorimetry.
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