Color Temperature to RGB Converter

About this calculator

Color temperature, measured in Kelvin, describes the hue of a light source based on the color a theoretical black body would glow at that temperature — low values around 2700K look warm and orange, daylight sits around 5500–6500K, and higher values above 10000K look cool and blue. Since there's no simple closed-form formula linking Kelvin to RGB, this calculator uses the Tanner Helland approximation, a set of piecewise polynomial fits for the red, green, and blue channels that closely matches real black-body chromaticity data.

Photographers, videographers, and lighting designers use Kelvin-to-RGB conversions to match white balance settings, mix LED or studio lighting, or preview how a given color temperature will render on screen. Web and graphics developers rely on the same approximation to simulate warm/cool lighting effects or generate a hex color swatch from a temperature value without needing full spectral rendering.