update color

example/lib/data/color_object.dart

@@ -24,7 +24,7 @@ List<ColorObject> colorObjects = [
     codeName: 'kTextColor',
   ),
   ColorObject(
-    color: Color.fromRGBO(0, 0, 0, 0.65),
+    color: Color(0xFF999999),
     name: '次文本颜色',
     codeName: 'kTextSubColor',
   ),

lib/styles/as_colors.dart

@@ -7,7 +7,7 @@ const Color kDarkColor = Color(0xFF333333);
 const Color kTextColor = kDarkColor;
 
 ///次文本颜色
-const Color kTextSubColor = Color.fromRGBO(0, 0, 0, 0.65);
+const Color kTextSubColor = Color(0xFF999999);
 
 ///主题色
 const Color kPrimaryColor = Color(0xFFF6B72D);