Tumblr Controls Effect

Tutorial by Unzo - http://unzo.tumblr.com/

01- Paste the following code after "<style type="text/css">" in your HTML code (ctrl+f to search)

#tumblr_controls{
    position:fixed !important;
    opacity:0.3;
    -webkit-filter:invert(100%);
    -moz-filter:invert(100%);
    -o-filter:invert(100%);
    filter:invert(100%);
}

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02- Update Preview -> Save. Refresh the page and done!