Oh, no problem. Since it's an SVG file and I made sure all the styles are in the header in CSS definitions, anyone could really change those two places which define the colours in mere seconds with a text editor, really.
The result looks like this. Pure vector SVG, so don't let any pixelation of the preview fool you.
I'm still not quite clear about what kind of monster variants you need, though.
As for me, I use HeroScribe. I grabbed the All-in-one Pack, decompiled the binary (... because whoever packed it forgot to include the actual up-to-date sources despite it being under the GPL), then changed it a bit so it uses SVG instead of EPS files (and could use them for rendering on the screen too, bypassing the need for creating PNGs, but I didn't fully implement it yet) as well as render the PDFs directly via the itextpdf library instead of needing Ghostscript. The result is still a bit rough around the edges, too rough for release really, but
single-board quests can be exported and look like I'd like them to.