Changing the background color of UI Element using a specific hex value

Hi,

I would like to change the background colour of a Web Dynpro UI Element e.g. Group by using a hex value e.g.#eefee.

The design property of a Group UI element allows the change of the background colour by selecting a value from the predefined drop down list next to it. Is there any way to identify which is the hex value of the colours included in this list? Is there any way to force it getting a specific background colour using a hex value?

Any help will be much appreciated.

Thank you in advance.

Kind Regards

Mike