diff --git a/components/firstui/fui-tag/fui-tag.vue b/components/firstui/fui-tag/fui-tag.vue
index 73cd064..5e70dac 100644
--- a/components/firstui/fui-tag/fui-tag.vue
+++ b/components/firstui/fui-tag/fui-tag.vue
@@ -115,7 +115,6 @@
 		data() {
 			const app = uni && uni.$fui && uni.$fui.color;
 			return {
-				// #ifdef APP-NVUE
 				dark: {
 					primary: (app && app.primary) || '#465CFF',
 					success: (app && app.success) || '#09BE4F',
@@ -123,12 +122,14 @@
 					danger: (app && app.danger) || '#FF2B2B',
 					purple: (app && app.purple) || '#6831FF',
 				}
-				// #endif
 			}
 		},
 		computed: {
 			getBackground() {
 				let background = this.background
+				if (!background && this.theme === 'plain') {
+					background = `rgba(${hexToRGB(this.dark[this.type])},.05)!important`
+				}
 				// #ifdef APP-NVUE
 				if (!background) {
 					switch (this.theme) {