SLFguy,
Yep, the stars are indeed different colours! mbcxharm explains it well.
Not sure what you mean by particle interference related but in answer to your question:
Is energy coloured?
The light we see is just one type of electromagnetic (EM) radiation characterised by a certain range of frequencies/wavelengths. X-rays, microswaves, gamma-rays, etc. are all other types of EM radiation, again, with different frequencies/wavelengths to visible light.
Our eyes are sensitive to visible light and our brains interpret different frequencies of visible light as different colours. So, in essence, different energies (read "frequencies") of light are detected by our eyes as different colours. In answer to the question: light of different energies appears, to humans, as different colours.
Cheers,
V1R
