No. There are lots of colors that our eyes can see, but which no 3-color device can produce. They're usually highly saturated, and many of the deep greens can't

No. There are lots of colors that our eyes can see, but which no 3-color device can produce. They're usually highly saturated, and many of the deep greens can't be produced by 3-color devices. What's going on here is different. The researchers managed to identify individual cones in the retinas of human subjects. They then shot tiny pulses of light at ONLY the M (green-sensitive) cones. This avoided stimulating the other cones, and subjects saw a color they could not have seen otherwise. The issue here is that the S, M, and L cones have overlapping sensitivity curves: normally if you shine green light on the retina, all three cones will respond, and your brain will say "green". But here they are stimulating only one cone, not all 3.