app/assets/stylesheets/sass/forms/_form_check.sass
@each $color, $value in $theme-colors
.form-check-input-#{$color}
&:checked
background-color: $value
border-color: $value
&:focus
border-color: $value
outline: 0
box-shadow: 0 0 0 $input-btn-focus-width rgba($value, $input-btn-focus-color-opacity)