Hi Somesh,
Thank you for your interest in Syncfusion Products.
The best way to set the color for the various Menu and ToolBar items for the MainFrameBarManager is by using the MenuColors class.
Refer the following code:
MenuColors.CommandBarBackColor = Color.Blue;
MenuColors.MenuBGColor = Color.AliceBlue;
Please refer the sample in the below link that illustrates the above.
http://websamples.syncfusion.com/samples/Tools.Windows/F72361/main.htm Please let me know if this helps.
Regards,
Anupama