Prevent scales not in palette from showing up in contrast tables

docs/_includes/contrast-table.njk

@@ -12,7 +12,7 @@
     </tr>
   </thead>
 {% for hue in hues -%}
-<tr data-hue="{{ hue }}">
+<tr data-hue="{{ hue }}" v-if="'{{hue}}' in paletteScales">
   <th>{{ hue | capitalize }}</th>
   {% for tint_bg in tints -%}
     {% set color_bg = palettes[paletteId][hue][tint_bg] %}

docs/docs/palettes/app/tweak.js

@@ -480,7 +480,7 @@ let paletteAppSpec = {
     },
 
     contrasts() {
-      return getContrasts(this.colors, this.originalContrasts);
+      return getContrasts(this.paletteScales, this.originalContrasts);
     },
 
     baseCoreColors() {