@namespace url(http://www.w3.org/1999/xhtml);
@-moz-document url-prefix('http://www.tumblr.com/'), url-prefix('https://www.tumblr.com/')   {
img[src*="https://secure.assets.tumblr.com/images/post_icons_sprite.png"],.new_post_label_icon {opacity: 0 !important;}

/*Replace the information between quotes with your image URL*/
#new_post {
background: rgba(255,255,255, 1.0) url('http://cache.gyazo.com/fa1178338b6c23acf093958675bfeb84.png') center center no-repeat !important;}
.new_post_label {
margin-top: 14px !important;
}}