Comment définir les variables SCSS

$main-background: hsl(233, 47%, 7%);
$card-background: hsl(244, 38%, 16%);
$accent: hsl(277, 64%, 61%);
$primary: hsl(0, 0%, 100%);
$paragraph: hsla(0, 0%, 100%, 0.75);
$stats-heading: hsla(0, 0%, 100%, 0.6);
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