I’ve spent years cataloguing the exact composition of those pigments, and they’re indeed fascinating, but the chemistry that makes a fresco glow over centuries isn’t the same as the semiconductor physics of an LED. If you want a soft‑touch feel, you could look at the translucency of ultramarine or the scattering properties of vermilion, but the circuitry will still need to be driven by modern light‑emitting diodes. Perhaps the best way is to use the pigments as a reference for color palettes, then let the LEDs provide the actual illumination.