Question

does this angle same for light of all colours

Answer 1

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$\mathfrak{\green{Answer:}}$If the light is not a pure white source (the case of nearly all forms of artificial lighting), the resulting spectrum will appear a slightly different color. Red paint, viewed under blue light, may appear black. Red paintis red because it scatters only the red components of the spectrum.
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Answer 2

Each wavelength is perceived by our eyes as a different color. The shorter wavelengths of visible light are violet — we might call them purple. Then as the wavelengths get longer and longer, the visible light changes in color to blue, green, yellow, orange, and finally the longest, which is red.