One further thought. The key is the phrase "to begin with" So even for sources that emmanate their own light, "to begin with" it is just starting to do so and that light has not yet reached your eye given the finite velocity of light of 3 x 10exp10 cm/sec. So in all cases there is no color detected by the eye "to begin with" However, wait a few nanoseconds and you might see something:)
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