Avoid white status bar items to ensure contrast

Fixes #4384

Author: Tyriar

src/observers/OmnisharpStatusBarObserver.ts

@@ -10,8 +10,7 @@ import { EventType } from "../omnisharp/EventType";
 export enum StatusBarColors {
     Red = 'rgb(218,0,0)',
     Green = 'rgb(0,218,0)',
-    Yellow = 'rgb(218,218,0)',
-    White = 'rgb(256,256,256)'
+    Yellow = 'rgb(218,218,0)'
 }
 
 export class OmnisharpStatusBarObserver extends BaseStatusBarItemObserver {
@@ -34,7 +33,7 @@ export class OmnisharpStatusBarObserver extends BaseStatusBarItemObserver {
                 this.ResetAndHideStatusBar();
                 break;
             case EventType.OmnisharpServerOnStart:
-                this.SetAndShowStatusBar('$(flame)', 'o.showOutput', StatusBarColors.White, 'OmniSharp server is running');
+                this.SetAndShowStatusBar('$(flame)', 'o.showOutput', 'OmniSharp server is running');
                 break;
             case EventType.DownloadStart:
                 this.SetAndShowStatusBar("$(cloud-download) Downloading packages", '', '', `Downloading package '${(<DownloadStart>event).packageDescription}...' `);