I do not currently have a set of those glasses so I can't test it, but three.js has this and it's pretty easy to add. There should be an "Anaglyph 3D" checkbox at the bottom of the configuration settings. Let me know if you are able to test it out.
I think adding third-dimension data would solve or mitigate the other issues, because full-color anaglyphs are possible, although at a reduced degree of subjective separation between the views.
Thanks for pointing out to me that an anaglyphic option is present, which I managed not to notice the first time.
Anyway, with third-dimension data, the anaglyph option ought to work -- for hard-core, old-fashioned red-blue eyeglass wearers. :)
There's some math at the bottom of my matplotlib extension for anaglyphs if you want to play around: https://github.com/scottshambaugh/mpl_stereo
Thanks! The 3D presets work, they provide good anaglyphic results. I didn't notice the presets option on my first visit.
So ... nice! Even with colors enabled, the 3D effect is clearly visible with red/cyan glasses.
Anyway, it's a nice online resource.