Color Temperature Calculator
Convert between color temperature (Kelvin) and RGB values. Understand warm vs cool lighting, get RGB/HEX codes, and learn about color temperature characteristics for photography, lighting design, and visual applications.
Range: 1000K (warm) to 40000K (cool)
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What is Color Temperature Calculator?
The Color Temperature Calculator converts a color temperature in Kelvin (K) to an approximate RGB color. Color temperature describes the warmth or coolness of white light, from warm orange (2700K) to cool blue (6500K+). The tool shows the resulting color with hex and RGB values. All processing happens in the browser.
How does Color Temperature Calculator work?
This tool applies an approximation algorithm that maps Kelvin values to RGB. Lower Kelvin values (2000-4000K) produce warm orange-yellow tones. Mid-range (5000-6500K) produces neutral white. Higher values (7000-10000K+) produce cool blue-white tones. The algorithm is based on Tanner Helland's approximation of the CIE daylight illuminant curve.
Key Features
- Converts Kelvin (1000K-40000K) to RGB
- Shows hex, RGB, and Kelvin values
- Interactive slider for temperature
- Visual preview of the resulting color
- Reference chart for common light sources
- Copy color to clipboard
- Runs in the browser with no uploads
- Real-time conversion
Common Use Cases
Photography white balance
Convert a light source's Kelvin rating to RGB to understand its color cast.
Interior lighting design
Compare warm (2700K) and cool (5000K) lighting colors for a room.
Screen calibration
Set a monitor's color temperature to 6500K (D65 daylight) and see the resulting white point.
Stage lighting
Convert gels and LED color temperatures to RGB for programming lighting consoles.
How to Use This Tool
Set the Kelvin value
Use the slider or type a Kelvin value (1000-40000K).
View the color
The tool shows the resulting color with its hex and RGB values.
Compare sources
Use the reference chart to compare common light source temperatures.
Copy the color
Copy the hex or RGB value for use in your project.
Pro Tips
- 1
2700K = warm incandescent light (orange-yellow). 4000K = neutral white. 6500K = daylight (blue-white).
- 2
Most indoor lighting is 2700K-3000K. Office lighting is typically 4000K-5000K.
- 3
6500K is the standard D65 illuminant used in sRGB color space.
- 4
Higher Kelvin values produce progressively bluer light.
Frequently Asked Questions
What is color temperature?
Color temperature is a way to describe the color of white light using the Kelvin (K) scale. Lower values are warm (orange-yellow), higher values are cool (blue-white).
What Kelvin range is supported?
The tool supports 1000K to 40000K, covering the full range from candlelight to deep blue sky.
Is my data sent to a server?
No. All conversion happens in your browser. Nothing is transmitted.
What is 6500K used for?
6500K is the D65 standard illuminant representing average daylight. It is the white point used in the sRGB color space.
Is the RGB conversion exact?
The conversion is an approximation based on published algorithms. It provides a good visual representation but is not a spectral measurement.
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