Create an approximate 8-bit sRGB screen record from an entered 1,000–40,000 K model value without predicting a lamp, room, camera, or human response.
A quick decision brief for this specific tool
Model temperature (K)
Kelvin → approximate sRGB preview
1 documented formula across 1 calculation mode
Choose your path
Create a reproducible approximate 8-bit sRGB screen record from one entered 1,000–40,000 K model value while keeping real source, fixture, room, camera and human-response decisions outside the algorithm.
Generate one stable screen-space reference without calling it a measured illuminant.
Enter the model Kelvin value, retain algorithm/version and copy the approximate RGB/HEX record with its display-only boundary.
Can reproduce the swatch without claiming spectral, device-independent or appearance accuracy.
Avoid choosing a lamp or room atmosphere from a generated hex color.
Use the Tool only for orientation, then compare exact product CCT, tint, lumens, rendering, flicker/dimming, glare and in-room samples separately.
Selects or rejects a product from exact evidence and affected-person observations, not the swatch.
Keep camera white balance, standard observers/illuminants, display profiles and human effects outside a one-input fit.
Inspect the algorithm branch and rounded channels, then use calibrated/spectral/colorimetric tools for the actual task.
Can reject the approximation when Duv, SPD, CRI/TM-30, luminance, camera/display calibration or person-specific evidence is required.
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
This tool is part of these guided projects. Each project provides step-by-step instructions with checklists and all the tools you need in one place.
Tools you might need next
Professional color picker with HEX, RGB, and HSL conversion, WCAG contrast checking, and palette generation. Pick colors and copy CSS-ready values instantly.
Convert HEX color to RGB. #ff5733 to rgb(255,87,51). For CSS and design. Free design tool with instant browser-based results — no account, works on desktop
Convert HSL to HEX color. Hue, saturation, lightness. For color manipulation. Free design tool with instant browser-based results — no account, works on
The calculator divides the entered Kelvin value by 100, applies a low-input logarithmic or high-input power branch, then rounds and clamps each channel to an 8-bit sRGB value. This is not a physical black-body, spectral, photometric, fixture, material, room, camera, or human-response simulation.
Inputs from 1,000 K through 40,000 K are accepted only because that is the documented domain of this empirical fit. Those endpoints are not product limits, room recommendations, safe ranges, or evidence that a real source follows the model path.
The RGB and HEX outputs agree with the same rounded sRGB channels. Exact product spectrum, chromaticity or tint, lumens or illuminance, CRI/TM-30, flicker, dimming, glare, display profile, material appearance and affected-person response require separate evidence.
Updated: August 2026
Retain the entered model value, algorithm basis and generated sRGB/HEX record as one reproducible screen-space reference—not a measured illuminant.
Use the swatch only to start a comparison, then verify the exact product’s CCT, tint, output, rendering, dimming, flicker, ratings and in-room observations independently.
Do not use this Tool when the task needs spectral or colorimetric measurement, calibrated camera/display behavior, material rendering, lighting design, electrical approval, accessibility, medical or circadian evidence.
The output is one algorithm-specific sRGB screen record. Real sources and rooms require exact product, spectral/colorimetric, photometric, material, display and observation evidence.
Needs, products, tint, output, rendering, glare, flicker, dimming, surfaces, daylight, age and affected-person responses vary. Compare the exact room and product instead.
Enter one model Kelvin value to create a reproducible approximate 8-bit sRGB preview. The result is intentionally narrow: it does not select a lamp or fixture, reproduce a spectrum, predict paint or skin appearance, set camera white balance, establish electrical suitability, or make health, safety, accessibility or room-quality claims.
