【看板客户端】【chat图背景色调整】

kanban-client/src/Charts/Theme/dark.js

@@ -54,7 +54,7 @@
     var colorPalette = ['#dd6b66','#759aa0','#e69d87','#8dc1a9','#ea7e53','#eedd78','#73a373','#73b9bc','#7289ab', '#91ca8c','#f49f42'];
     var theme = {
         color: colorPalette,
-        backgroundColor: '#333',
+        backgroundColor: '#2f2e2c',
         tooltip: {
             axisPointer: {
                 lineStyle: {