track > variation : add bg color

src/components/project/virtual-sample/SingleImage.vue

@@ -1,5 +1,5 @@
 <template>
-  <figure>
+  <figure :style="'--bg-color:' + backgroundColor">
     <img :src="file.url" alt="" />
   </figure>
 </template>
@@ -9,7 +9,8 @@ import { storeToRefs } from 'pinia';
 import { useVirtualSampleStore } from '../../../stores/virtualSample';
 import { watch } from 'vue';
 
-const { file } = defineProps({
+const { file, backgroundColor } = defineProps({
+  backgroundColor: String,
   file: Object,
 });