DevMaster.net now supports style selection for the entire site. We've added a new dark theme for those who are more comfortable with darker styles. The style selector can be found at the very end of the forums page, where you'll see a combobox with available styles. Note that you do not have to be a registered user to change the site style (cookies must be enabled). Registered users can change the site style via the User Control Panel, which sets the desired skin regardless of which computer or browser used.
If you're interested in making a new DevMaster.net style and have experience with CSS, then contact us!
Comments and suggestions are always welcome.