basecamp-style.user.js

// ==UserScript==
// @name        Basecamp prettification
// @description A user stylesheet to make Basecamp a little bit prettier. Custom colors, a bit of jiggery-pokery with the header spacing, hide the milestones calendar from the dashboard page, hide the company logo (if you have one).
// @include     https://*.basecamphq.com/*
// ==/UserScript==

var cssNode = document.createElement('link');
cssNode.type = 'text/css';
cssNode.rel = 'stylesheet';
cssNode.href = 'http://gist.github.com/raw/236875/4316c5130f701fa7a62dd2b5e5859b9d8bb2fc55/basecamp-custom.css';
cssNode.media = 'screen';
cssNode.title = 'dynamicLoadedSheet';
document.getElementsByTagName("head")[0].appendChild(cssNode);