My app bar is fine now, and I switched to white logos so that I could use the company's dark color to make the app bar white text readable. (I still think this needs some work though - the default text is white, so you have to choose a dark header color in order to make it readable...that doesn't seem like a good end all be all solution for those who want a light header, but I've made do.)
My concern is the table bar - the purple Home/Users/New Table icon. You're saying I have control to fix those colors? I don't see where I have the ability to adjust that on my own?