$black: #000; $white: #fff; $background-color: #1e3f51; $foreground-color: $white; $link-color: #fd0; $board-border-color: #000; $board-shadow-color: rgba(0, 0, 0, 0.4); $board-square-size: 9vmin; $base-font-size: 16px; $black-square-color: #777; $white-square-color: #bbb; $selected-square-color: #0cf; $available-square-color: #6f0; $your-turn-background-color: rgba($white, 0.1); $game-state-background-color: rgba(darken($black-square-color, 10%), 0.9); $square-outline-color: darken($black-square-color, 20%); $selected-outline-color: lighten($selected-square-color, 20%); $available-outline-color: rgba(lighten($available-square-color, 20%), 0.5); $colours: "black" "white"; $pieces: king queen bishop knight rook pawn;