ux: updated singlestat default colors

public/app/plugins/panel/singlestat/module.ts

@@ -66,7 +66,7 @@ class SingleStatCtrl extends MetricsPanelCtrl {
     thresholds: '',
     colorBackground: false,
     colorValue: false,
-    colors: ["rgba(245, 54, 54, 0.9)", "rgba(237, 129, 40, 0.89)", "rgba(50, 172, 45, 0.97)"],
+    colors: ["#299c46", "rgba(237, 129, 40, 0.89)", "#d44a3a"],
     sparkline: {
       show: false,
       full: false,