Hey everyone,
I’ve run into the same issue we all face in Unreal Engine—lighting color temperature is usually defined in Kelvin (e.g., 2200 K for a warm glow), but UE only accepts RGB/HEX (or linear/HSV) values. Manually guessing the right RGB is tedious and often inconsistent across scenes.
So I built a free web app that does the conversion for you:
- Pick any Kelvin value (1,000 K–10,000 K+) with a simple slider
- Preview in three modes: room, space, or 2D viewport
- Copy the exact RGB, HEX, linear, or HSV color—or export JSON with all values
- Paste directly into your UE light color settings
It also includes presets (candlelight, halogen, soft white, daylight, dining room, studio fluorescent, and more) for quick access.
I’ve attached a short demo video showing how to set up a 2200 K warm glow in just a few clicks.
Try it here: https://kelvin-to-rgb-visualizer.vercel.app/
Source on GitHub: GitHub - marufx86/kelvin-to-rgb-visualizer: Convert Kelvin temperature to RGB, HEX, and visualize lighting effects
YouTube Preview: https://youtu.be/6hMDMV7FWEA
Would love feedback, feature requests, or any bug reports. And if you have other lighting-workflow tips, please share!
Cheers,
Maruf Khan Ornob