Github user soralee commented on the issue: https://github.com/apache/zeppelin/pull/2371 ### 4. (bug) didn't revert original color when I click a navbar icon and escape. it is same bug with https://github.com/apache/zeppelin/pull/2401#issuecomment-307058027 as well.  And I fixed a commit : https://github.com/apache/zeppelin/pull/2401/commits/762635d09c879233cd498440e9f8b36d2e8c6988 although the two contents are in one commit, I hope it would help you.
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