$transparent-bg: rgba(255,255,255, 0.95); $transparent-bg-blk: rgba(0,0,0, 0.75); $alpha: 0.90; $color-base:#69cdcf; $color-base-transparent: change-color($color-base, $alpha: $alpha); $color-showrooms:#50aa3c; $color-showrooms-transparent: change-color($color-showrooms, $alpha: $alpha); $color-blabla:#9458aa; $color-blabla-transparent: change-color($color-blabla, $alpha: $alpha);