I have a few global colours defined and they all work in the Gutenberg editor, but one of them doesn’t work on the front end.
I usually use my colours as background colours to sections or paragraphs, but this one colour with the id of info2 just doesn’t display on the front end. If I switch to a different global colour it works just fine.
I created a test post on the staging site (link in other box) that shows examples of colours working, and the one that does not. Inspecting the CSS I can see that the colour is correctly defined, but for some reason, if you inspect the element, the background colour information is missing.
In these examples I’m using the global colour as a background colour, but the same problem occurs when using the colour for other things such as text colour.