ISTWCMS-6110: Adds the faculty colours array to the mark element

src/patterns/01-core/elements/_inline-elements.scss

@@ -114,7 +114,6 @@
 }
 
 :where(mark) {
-  background: var(--uw-gold-2);
   color: var(--uw-black);
   padding: var(--size-xs) var(--size-05);
   /* Ensure the padding shows when there are line breaks. */
@@ -122,6 +121,28 @@
   box-decoration-break: clone;
 }
 
+@each $faculty, $colour in $faculties_colours {
+  .#{$faculty} {
+    @if $faculty == org-default or $faculty == org-art or $faculty == org-sci {
+      :where(mark) {
+        background: var(--#{$colour}-2);
+      }
+    } @else if $faculty == org-stj or $faculty == org-ren {
+      :where(mark) {
+        background: var(--#{$colour}-light);
+      }
+    } @else if $faculty == org-stp {
+      :where(mark) {
+        // For accessible AAA, fraction light than -light.
+        background: #65b4dc;
+      }
+    } @else {
+      :where(mark) {
+        background: var(--#{$colour}-1);
+      }
+    }
+  }
+}
 :where(samp) {
   font-family: var(--font-mono);
 }