Hi,
Thanks for your interest in Syncfusion products.
Most of our controls supports Office2007ColorScheme, you can make use of this color scheme to have a consistent appearance.
ColorScheme support is not provided for TextBoxExt and it supports to change its background as well the foreground, refer the following documentation for further information.
http://help.syncfusion.com/ug_83/User%20Interface/Windows%20Forms/Tools/default.htm?turl=Documents/appearancesettings8.htmhttp://help.syncfusion.com/ug_83/User%20Interface/Windows%20Forms/Tools/default.htm?turl=Documents/bordersettings6.htmYou can find information on the appearance of our controls in online documentation under the section 'Concepts and Features >> Appearance Settings'.
Please let us know if you have concerns on this.
Regards
Vallarasu S.