Hi Gurvinder Singh,
Thanks for contacting Syncfusion support,
We have analyzed your query “To change the date selection color” and it can be achieved by using DateSelectionColor property of MonthViewSettings, we have prepared a simple sample for the same, kindly find the sample below.
We hope that this helps you, kindly revert us if you have any concern.
Regards,
Vigneshkumar R