Fix BoxCTA internal layout

src/style/_variables.scss

@@ -2,6 +2,7 @@
 $color-primary: #3C0576;
 $color-primary-dark: #36046A;
 $color-primary-darker: #2D0458;
+$color-primary-tertiary20: #633185;
 $color-secondary: #FF6C89;
 $color-secondary-light: #FFB3C2;
 $color-secondary-bright: #FF0536;