You can collect a set of like values into a map with the following SCSS syntax:
$backgrounds: (
"gray": #AAAAAA,
"red": #FF4136,
"blue": #0074D9,
);
You can then access a value from the map using the map-get
function:
.boxA {
background-color: map-get($backgrounds, "gray");
}
.boxB {
background-color: map-get($backgrounds, "red");
}
.boxC {
background-color: map-get($backgrounds, "blue");
}
See a live example here.