Changing tumblr. dashborad style

Step 1: Download the Stylish Browser Extension.
Step 2: Choose your desired dashboard theme here.
Step 3: Change the browser to the one you use in the drop down menu.
Step 3: Click in Install.
Done!
Google Chrome users:
Step 1: Choose your desired dashboard theme here.
Step 2: Click in Install as a user script

http://userstyles.org/styles/browse/tumblr

End