Can RGB screen color exist in real physical world?

For example the bright royal blue color; R0 G10 B220, HEX: #000ae1. I know this color cannot be printed nor painted. But can this blue color exist in the real world other than on a digital screen? For example the aurora in the sky, or a rainbow in the sky, or a blue glass bottle?

• Remember that our vision (and that of RGB screens) are limited to the visual spectrum, which is just a very small part of the electromagnetic spectrum. Since photons with any frequency in the spectrum can be produced, you could have colors that you can't even see with your eyes, and not because of that they stop being real frequencies of light. – Charlie Mar 21 '19 at 1:16
• The question may be a nonsequitur. Humans only see 3 colors, based on the cone cells in their retinas. Whether a color can be printed or painted does not change this fact. In addition, the 3 colors that we can see do not constrain in any way the colors that can exist in nature. – David White Mar 21 '19 at 2:19

We typically only have three kinds of cones mediating our color perception (roughly, we integrate spectral radiance with three different sensitivity functions to get the response $$r_{red}=\int L(\lambda) x(\lambda) d\lambda$$, $$r_{green}=\int L(\lambda) y(\lambda) d\lambda$$, $$r_{blue}=\int L(\lambda) z(\lambda) d\lambda$$ somewhat like in the CIE system). Since this compresses a high-dimensional spectral space into a few responses, there are many spectral radiances that give the same visual response.