button color

place a twebbutton and a twebedit on a twebpanel.

select property color in both components and change it to red.
twebedit is working in ide and in the resulting website.
But not the button. Buttons are always shown in gray.

what am i doing wrong ?

Button Color property was incorrectly added as property. Just like for a VCL TButton is should not be there. We prefer to make the base class as consistent as possible with VCL. We've corrected this internally now. Next update will address this.
If button customization is desired, this can be done via CSS.