Just got blender - can't see the menus - window too dark

Ok ignore below, fortunately I found myself in a chatroom with a blender user and he talked me through it :smiley:

Complete noob to blender.  I am failing to clear the first hurdle.  The background is too dark for me to really see what I am doing.  I need to quickly make the window color a bit lighter before I can do anything.  I have my monitor up to the brightest it can go but am still getting eyestrain.

I did find my way into user preferences and changed a few colors in that but it doesn't seem to get applied to the main interface, so what shall I try next?