Hi Tjismh,
Thank you for conatacting Syncfusion support.
Based on provided information we have analyzed your requirement is “Changing the color of the TextColor in the button of the Picker”. In dataform there is no support to changing the text color of button in the picker. Also, and it can’t be achieved in the sample level too.
We hope that this helps you, kindly revert us if you have any concern.
Regards,
Indumathi R