Depending what sort of website / blog you want to build, a dark WordPress theme can be very effective. Portfolio sites work well dark, as they let the work stand out more and the actual site to sink back. You have to be carefull with readability issues with dark themes and make sure the contrast for the text is ok. I have been scouring the internet to find the best examples of dark / black Free WordPress themes, and here they are …
Blog-O-Folio is a free 2 column WordPress Theme suitable for any and all of your corporate, portfolio or personal blog needs. With a wide variety of tunable theme options and functionality to merge your portfolio with the blog, it is now ultra easy to maintain your blog and portfolio at the same time.
SimploBlack theme from Site5Hosting
Rockwell theme from Site5Hosting
Wise Business theme from Site5Hosting
DesignPile WordPress Theme, a theme designed by Site 5 and released for Smashing Magazine and its readers. The theme comes with 3 color styles and a couple of jQuery-based goodies.
Tantalumize WordPress theme is a free kick-ass portfolio theme where you can easily showcase your high quality featured works and services to potential clients.
Erbiumifide WordPress theme is our first awesome blog theme which integrates the Google +1 button to your site so that your readers can automatically recommend your content to Google search for an added SEO boost.
Lutetiumness WordPress theme is a professional business WordPress theme that comes with awesome features like the stylish slider, 3 widget front page widgets and custom typography.
The theme features an elegant design that uses a dark (brown) content area against a light page background accented by a spiffy floral pattern reminiscent perhaps of libraries of old estate manors in the movies (or if you own one).
DailyNotes is our latest theme release. We wanted a theme for the every day person, It uses a dark background with a lighter background around the content. 2 columns and an area to link to your twitter account in the sidebar.
Evidens is a new 3 column, full width theme from Design Disease. Featuring both White and Dark variations, this modern/industrial theme is both elegant and edgy at the same time.
deStyle is a fully featured blog magazine WordPress theme and is completely free! If you’re planning an attractive and professional blog magazine, deStyle is first choice.
Obscure is a premium dark magazine wordpress theme suitable for any site nitche and best fit for community based site.
Kelontong Lite free WP ecommerce themes will sell more of your apps products with our straight-to-the-point, visitor friendly theme. Mac-like appearance, top notch slide show column for your featured products, and calm colors of white and dark grey. Awesome.
Gamerpress is a new free premium wordpress theme from web2feel. The theme is designed with a dark grungy look and feel. Very suitable for gamer blogs and blogers who like to use dark and grungy designs. The theme comes with lot of cool features like sliding posts, minipost area with thumbnail images, adsense integration, featured video section etc.
Firecrow is our new fabseries theme. This is a dark stylish theme for your personal blog. Theme is designed with a black and blue grungy design style. This suitable for your gaming, movies, music band, gadgets blog.
Alfredo is a free premium WordPress theme with theme options page. Suitable for any niche. Dark style design.
WoodMag is a premium wordpress magazine theme. Please read file attached for instructions/help. Wood style theme, Grey is dominant colour on this theme.
A dark WordPress theme. Build in links and archives pages. Widget support. The theme is released under GPL.
Masinop is a WordPress theme tested on the latest version of WordPress, modern design, two columns, adsense ready with advertising blocks, left sidebar, cross browser compatible with IE, FF, Opera, Flock & Safari, valid XHTML & CSS, Ajax tabbed sidebar and widget ready.
Black colored theme with widget ready right sidebar and twitter support. Theme also supports ads.
Striking wordpress theme with featured posts, social icons, 125×125 ads, twitter updates, threaded comments, multi page format.
Eliz is a dark elegant theme, great colors modern style, highly customizable.
A clean dark wordpress theme, ideal for photographers and designers to showcase their portfolio.