We see rainbow color on short-wavelength side as violet or purple:
And this color is obviously contain R component from RGB.
How can this happen, if only blue pines can percept this color, while red pines are on the opposite side of the band?
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5Possible duplicate of Why does light of high frequency appear violet? – John Rennie Jun 08 '16 at 15:25
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1And there are lots of other related questions – John Rennie Jun 08 '16 at 15:25
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And something deep in the blue (like a He-Cd laser at 441nm) does not look anything like the 'purple' patches above. – Jon Custer Jun 08 '16 at 16:33
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@JonCuster But does it still looks containing some red component? – Dims Jun 08 '16 at 16:47
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No. Not at all. – Jon Custer Jun 08 '16 at 19:04
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@JonCuster sorry, yes, 441 is looks like should be blue. Purple should be around 400 nm. – Dims Jun 09 '16 at 11:27