LumiCast

LumiCast is a color temperature simulation tool designed for anyone who works with color in varying lighting conditions.

Core Features:

Color Temperature Lab - Place a test color swatch and observe how it appears under different color temperatures ranging from 2000K to 10000K. The real-time slider lets you smoothly transition between warm candlelight and cool blue sky tones.

Light Source Presets - Browse a curated list of common light sources organized by warmth category, including candle light, incandescent bulbs, halogen lamps, daylight, overcast sky, and more. Each preset displays its Kelvin value alongside a visual color swatch.

Side-by-Side Comparison - Compare how the same base color appears under two different light sources simultaneously. Select from red, green, blue, or gray test colors and adjust each source independently to see the visual and numerical difference.

Privacy-Focused - No data collection, no analytics, no ads. All processing happens locally on your device. No account required.

How It Works:

LumiCast uses a color temperature to RGB conversion algorithm based on Kyle McDonald's Planckian locus approximation to simulate realistic lighting effects on colors. The multiplicative blending model normalizes against a D65 reference white point for accurate relative color shifts.