diff --git a/packages/vant-css/src/button.css b/packages/vant-css/src/button.css
index 7ac742a81..0b1bd259c 100644
--- a/packages/vant-css/src/button.css
+++ b/packages/vant-css/src/button.css
@@ -6,7 +6,7 @@
   display: inline-block;
   height: 45px;
   line-height: 43px;
-  border-radius: 4px;
+  border-radius: 3px;
   box-sizing: border-box;
   font-size: 16px;
   text-align: center;
diff --git a/packages/vant-css/src/common/var.css b/packages/vant-css/src/common/var.css
index 79488fd19..35ecd2d8f 100644
--- a/packages/vant-css/src/common/var.css
+++ b/packages/vant-css/src/common/var.css
@@ -12,23 +12,23 @@ $gray-dark: #999;
 
 /* default colors */
 $text-color: #333;
-$border-color: #ccc;
+$border-color: #eee;
 $active-color: #e8e8e8;
 $background-color: #f8f8f8;
 
 /* button */
 $button-default-color: $text-color;
 $button-default-background-color: $white;
-$button-default-border-color: $gray-light;
+$button-default-border-color: $border-color;
 $button-primary-color: $white;
 $button-primary-background-color: #4b0;
-$button-primary-border-color: #0a0;
+$button-primary-border-color: #4b0;
 $button-danger-color: $white;
 $button-danger-background-color: $red;
-$button-danger-border-color: #e33;
+$button-danger-border-color: $red;
 $button-disabled-color: $gray-dark;
-$button-disabled-background-color: $gray-light;
-$button-disabled-border-color: $border-color;
+$button-disabled-background-color: $border-color;
+$button-disabled-border-color: $gray-light;
 $button-bottom-action-default-color: $white;
 $button-bottom-action-default-background-color: #f85;
 $button-bottom-action-primary-color: $white;
diff --git a/packages/vant-css/src/slider.css b/packages/vant-css/src/slider.css
index 982988fa0..becabeba0 100644
--- a/packages/vant-css/src/slider.css
+++ b/packages/vant-css/src/slider.css
@@ -3,7 +3,7 @@
 .van-slider {
   position: relative;
   border-radius: 999px;
-  background-color: $border-color;
+  background-color: $gray-light;
 
   &__bar {
     position: relative;