Oranžová se dá celkem snadno zlikvidovat

Tohle je pro Stylish ve Firefoxu:

@-moz-document domain('diit.cz') {
div.header h2, div.top-sections, div.black-box {background-color: #034c72 !important;}
div.text a {color: #fff !important;}
div.item span, div.item span a, a.header {color: #000 !important;}
a.discuss, a.orange, a.more, div.sections, div.sections a, div.discussion strong, div.tags, div.tags a, div.item small {color: #034c72 !important;}
}