Hi Brijesh,
Thank you for contacting Syncfusion support.
We have checked your query "How to change the TabScrollButton Icon color, Background and MouseHoverBackground of TabControlExt". You can achieve your requirement by customizing the TabPanel style of TabControlExt. We have also prepared sample based on your requirement in which we have changed the Icon color, Background and MouseHoverBackground color for TabScrollButton in TabPanel style. Please download the same from the below location.
Sample:
TabControl_Sample
If we misunderstood your requirement, please provide more information regarding the requirement. This would help us to proceed further.
Regards,
Subashini M.