How to Hide,Remove or Change Color of Google Black Bar

Recently Google has rolled out new Google Black Bar and it now appears across to all Google service like in gmail, google search and in other Google pages.Before using the black bar google use white color which was less visible but now many of google users who do not like this black bar and they are trying to remove this black bar from google.Now who do not like the google black bar i will tell you how you can remove or change 
it.Follow the different method for different browser to change this google black bar.