This is the result - on the Variable Selector Dialog - of a high-contrast theme I have applied in Windows, for overall better visibility with less eye-strain.
(https://www.photools.com/community/index.php?action=dlattach;topic=12160.0;attach=28729;image)
Although its effect is mostly helpful with low-vision, there is unfortunately some negative side-effects. Like the text, sometimes, ending up less-readable because of poor contrast.
Because of this, does IMatch make it possible to change the color of these fonts to something brighter?
There is no user setting for these colors. Add a feature request so I can learn for how many users this is an issue.