I’m sure there are better ways, but you could just add this css and it will work…
.custom-control-label{ color: gray !important }
using whatever colour you want your text to be in the label
That’s for the custom checkbox class. Naturally this just overrides the text colour and uses the important tag. Which stops the bootstrap validation classes being applied.
Probably shouldn’t use !important but its one option.
I’ll see if i can find the non-destructive way of doing it