Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.13)
// Compass (v1.0.3)
// ----

.item {
    $map: (
        accepted: red,
        declined: blue,
        paid:     green
        );
    @each $class, $color in $map {
        &.#{$class} {
            border-left-color: $color;

            & .booking-details {
                background-color: $color;
            }
        }
    }
}

SassMeister-output.css

.item.accepted {
  border-left-color: red;
}
.item.accepted .booking-details {
  background-color: red;
}
.item.declined {
  border-left-color: blue;
}
.item.declined .booking-details {
  background-color: blue;
}
.item.paid {
  border-left-color: green;
}
.item.paid .booking-details {
  background-color: green;
}