Config options don't change appearance of SVG output about mathjax-node

[dpvc]

Changing the configuration has not seemed to yield any differences in rendering whatsoever.

Not all MathJax configuration options apply to mathjax-node. One of these is the scale parameter. In the browser, MathJax handles the scale by placing a <span style="font-size:70%"> element around the <svg> element, but that is not included in the mathjax-node output, since that produces only the <svg> element. You can modify your code to include a surrounding <span> to include the needed scaling factor, if you want.

Also note that mtextFontInherit: true, while allowed, will not produce the result you may be expecting. Since mathjax-node does not have access to the surrounding font (as MathJax does in the browser), it can not know the size of the text in that font, and so doesn't know how much space to leave for it. So mathjax-node uses the monospace font, so that it can approximate the size better.

As for the darkness, I am not able to reproduce the result you are seeing. Can you link to an actual page that shows it? You might try changing the blacker option in the SVG configuration block. Its default should be 1, but try setting it to 1 or 0 and see if that helps.