Yes, a bit harsh on the Yellow/Black contrast.  At first glance, the "Advanced" looks like a yellow blob to me.  Maybe that's a good thing, in that you have to look twice to figure out what it says.  But, if you want that "FLASH" of recognition, it's a bad thing.
I like contrasting colors though.  I noticed some web page yesterday that was a bright light blue with white lettering and, when I left that page and went to a different one, the blue/white was still burned into my eyes.  One of those "ghost" images.
wrongway