Dan Nicolaescu <dann@ics.uci.edu> writes:

> Please also test on a 256 color xterm (with both white and light gray
> background), the colors are very very similar, but not all are
> completely identical...

Yes, I've done that.  Results are shown.

You're right that font-lock-variable-name-face is too close to
font-lock-string-face; I swapped it with DarkOrange4, and that seems to
work better.