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
bg-opacity
bg-opacity-75
bg-opacity-50
bg-opacity-25
bg-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