Looks like you were overriding .btn and .btn-primary, but not the rest. I haven't played with this at all, but would it be possible to come up with dark variants of the rest of the classes (muted, success, warning, info, danger) to preserve the intent but use different/more muted colours?
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From Michael J. Ryan@VERT to GitLab note in main/sbbs on Sun Feb 28 18:49:41 2021