diff --git a/src/components/echarts/PolarHalf.vue b/src/components/echarts/PolarHalf.vue
index 722f01e..bce7ab5 100644
--- a/src/components/echarts/PolarHalf.vue
+++ b/src/components/echarts/PolarHalf.vue
@@ -197,16 +197,16 @@ onMounted(() => {
                     width 80px
                     text-align right
                 &:hover
-                    background linear-gradient(90deg, transparent, black)
+                    background linear-gradient(90deg, transparent, rgba(0, 255, 255, 1))
                     position relative
                     &::after
                         content ' '
-                        width 18px
+                        width 19px
                         height 30px
                         display block
                         box-sizing border-box
                         border-style solid
-                        border-color transparent transparent transparent black
+                        border-color transparent transparent transparent rgba(0, 255, 255, 1)
                         border-top-width 18px
                         border-left-width 9px
                         border-right-width 9px