[ginko]

With two wavelength-tunable LEDs you should be able to cover the entire CIE colorspace.

That's because the points on outer edge of CIE are pure wavelengths and you can get to any point inside by interpolating between two of them.

[bobmcnamara]

How do you make white?

[meindnoch]

E.g. mix 480nm cyan and 590nm orange.

[llama_drama]

Would this be practical? Or would it be similar to how printers have separate black ink, which is theoretically unnecessary?

[layer8]

By mixing two complementary colors.