Commented Issue: DropDownExtender HighlightBackColor property only works with basic colors [27906]

Hello,

I want to use the DropDownExtender control and define the HighlightBackColor. If I set HighlightBackColor to "blue" or the Hex equivalent it works. If I set the HighlightBackColor to "#0065AD" it works not. What can I do?
Comments: The title was edited as this issue is included in What's new list for the v15.1.4 release.