Hi Arnard,
Sorry for the inconvenience caused.
We have analyzed the reported issue with our sample; we are not able to reproduce the issue. Can you please check with the sample in the following location? If still you face the problem, please revert us by modifying the sample based on your application along with replication procedure. This would be helpful for us to serve you.
Regarding the query: modify RGB using textbox, but they are read-only. Can I change that ?
We are unable to edit the value of textbox its only to view the RGB value of color in the Colorpicker this is one of the default behaviour.
Sample :
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=Sample1164649133.zipPlease let us know if you have any queries.
Thanks,
Karthick