Related to #129.
With the demo app using darkly, the text doesn't have enough contrast for some of the background colors:

The https://bootswatch.com/darkly/ page has white text with these backgrounds:

The white text in this case is specified by the text-white class, which is added in addition to the bg-info and similar classes.
Similarly, for Cerulean:

And from https://bootswatch.com/cerulean/:

One possibility is to add (for example) color: white for .bg-info.
Related to #129.
With the demo app using darkly, the text doesn't have enough contrast for some of the background colors:
The https://bootswatch.com/darkly/ page has white text with these backgrounds:
The white text in this case is specified by the
text-whiteclass, which is added in addition to thebg-infoand similar classes.Similarly, for Cerulean:
And from https://bootswatch.com/cerulean/:
One possibility is to add (for example)
color: whitefor.bg-info.