Move black header styling to sub header component

src/iss-components/site-sub-header/site-sub-header.vue

@@ -85,6 +85,9 @@ export default ({
       button {
         color: inherit;
       }
+      span{
+        color: $black;
+      }
     }
     p.light-gray {
         color: $gray-550;

src/layouts/contact-details/contact-details.vue

@@ -213,12 +213,6 @@ export default {
 </script>
 
 <style lang="scss" scoped>
-#sub-header {
-    span {
-        color: $black;
-    }
-}
-
 .dark-gray {
     color: $darker-gray;
 }