The colors are good. But besides that there are a few mistakes you made while designing.
The width of the header should match the width of the lower 'frames' of the website. At this moment it's not wide enough.
Try to stylize the tables a bit by using CSS. You can set the width of the border to 1px, which makes the site look a bit smoother.
The light brown part below the main navigation menu doesn't show correctly. On the left side, around the vertical center of the bar, I see spot that shows the background color. Besides that, I'm not sure what the bar does, so you should get rid of it, or make it a functional bar.
Hope you can use the tips
