Fixed alert message visibility

src/components/AlertMessage.vue

@@ -1,7 +1,7 @@
 <template>
   <div v-bind:class="computedAlertClassNames()">
     <button
-      class="close-button bg-slate-200 w-8 leading-loose rounded-full absolute top-2 right-2"
+      class="close-button bg-amber-400 w-8 leading-loose rounded-full absolute top-2 right-2"
       @click="onClickClose()"
     >
       <fa icon="xmark"></fa>
@@ -28,7 +28,7 @@ export default class AlertMessage extends Vue {
     return {
       hidden: !this.isAlertVisible,
       "dismissable-alert": true,
-      "bg-slate-100": true,
+      "bg-amber-200": true,
       "p-5": true,
       rounded: true,
       "drop-shadow-lg": true,