diff --git a/docs/changelog/2026-06-12-watch-slot-ttl-metrics-ui.md b/docs/changelog/2026-06-12-watch-slot-ttl-metrics-ui.md
index b0567227..a29721de 100644
--- a/docs/changelog/2026-06-12-watch-slot-ttl-metrics-ui.md
+++ b/docs/changelog/2026-06-12-watch-slot-ttl-metrics-ui.md
@@ -44,4 +44,4 @@ bash scripts/local_verify.sh
 
 ## 补充（进度条阈值）
 
-- CPU/内存/硬盘进度条：**≥80% 变红**，低于 80% 为绿色（`WatchMetricBar.vue`）。
+- CPU/内存/硬盘进度条：≥90% 红、70–89% 黄、<70% 绿（`WatchMetricBar.vue`）。
diff --git a/frontend/src/components/watch/WatchMetricBar.vue b/frontend/src/components/watch/WatchMetricBar.vue
index c7845553..f4971eff 100644
--- a/frontend/src/components/watch/WatchMetricBar.vue
+++ b/frontend/src/components/watch/WatchMetricBar.vue
@@ -5,7 +5,8 @@ const props = defineProps<{
 }>()
 
 function barColor(v: number): string {
-  if (v >= 80) return 'error'
+  if (v >= 90) return 'error'
+  if (v >= 70) return 'warning'
   return 'success'
 }