After reading the thread about dispersion I found amongst my cycles shader a “Full Glass” node setup, and set about experimenting. I wish I could take credit for the shader, but other than slight modification, it isn’t mine. The problem is, I don’t know who made it (and I can’t find it again with a Google search), so if anyone knows, I’d be happy to give credit.
There’s nothing in either the scene or post to add any colour whatsoever, other than a slightly orange sun (blackbody 5750). Apart from that, there’s a simple white area light, and a desaturated and heavily contrasted HDRI.
Post simply adds the glares. Again, no colour adjustments.