Bootstrap 5 has some contextual classes that can be used to provide "meaning through colors“.
The classes for text colors are:  .text-muted, .text-primary, .text-success, .text-info, .text-warning, .text-danger, .text-secondary, .text-white, .text-dark, .text-body (default body color/often black) and .text-light
Add 50% opacity for black or white text with the .text-black-50 or .text-white-50 classes
The classes for background colors are: .bg-primary, .bg-success, .bg-info, .bg-warning, .bg-danger, .bg-secondary, .bg-dark and .bg-light.