.bg-primary
.bg-secondary
.bg-warning
.bg-info
.bg-success
.bg-danger
.bg-light
.bg-dark
.border-primary
.border-secondary
.border-warning
.border-info
.border-success
.border-danger
.border-light
.border-dark
.opacity-100
.opacity-75
.opacity-50
.opacity-25
.opacity-10
.text-primary
.text-secondary
.text-warning
.text-info
.text-success
.text-danger
.text-light
.text-dark
.text-muted
100% opacity
.text-opacity-75
.text-opacity-50
.text-opacity-25