@FreelanceReinh is probably right here. In the windows properties you can of course set the colors you want, however there is also other settings, contrast is the one which is probably affecting you here. Basically there is a need for contrast, what is probably happening is that the color you have chosen for your Windows theme is conflicting with the SAS window theme so it switches the color. Try setting the contrasts, or change the color of widows.
http://usability.com.au/windows-7-change-colour-contrast/
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