use class .switch-label to add a label to switch.
Use class .custom-switch-#{$color-name} with .custom-switch to change switch's
color
Primary
Success
Danger
Info
Warning
Dark
Use class .switch-text-left & .switch-text-right inside of
.custom-control-label to create a switch with text.
Use class .switch-icon-left & .switch-icon-right inside of
.custom-control-label to create a switch with icon.
Primary
Success
Danger
Info
Warning
Dark
use class .switch-{md | lg} with .custom-switch for medium or large size
Default
Medium
Large