A common feature on blogs is a horizontal navigation bar just above your blog's banner. Here's a tutorial to show you how to change that bar's appearance. Some bloggers find that the Navigation bar can clash with their design or if it is to light it can't be seen. For blogger the bars contains valuable information such as your Dashboard, log in, Design button and more. You want to be able to see this feature.
To Edit this bar click on Design in On your Navigation bar. When
your design screen pops up click on EDIT. This will give you the options that are available.
Choose a bar that works best for your blog. Don't forget to save.