I'm using SharePoint Online, and have chosen the 'Immerse' theme. This suits my client, who prefers a dark colourway. Everything is fine, body text renders as white on a dark background...
..However.. when I use the Taxonomy picker as an end user, the Terms show as black on a dark background. They are almost impossible to read.
I don't know where to begin to fix this.
1) I've looked at the following: https://docs.microsoft.com/en-us/sharepoint/dev/general-development/color-palettes-and-fonts-in-sharepoint and it suggests that the SubtleBodyText is "Body text that must be lighter than normal. An example is metadata text", soooo... I've read the value of SubtleBodyText for the 'Immerse theme' in the SharePoint Color Pallete tool, and it is showing as a light grey - so by a process of elimination I've concluded that it's not SubtleBodyText.
2) I've checked in different browsers, all return the same result. I can't imagine that MS produced a theme that did not support the Taxonomy Picker function... but maybe they have!