Proposal: Web Design
CSS and many other tags are already handled by Webmasters site.
Why would you start a separate proposal for web design?
Well yes and no. You see webmasters is for people who maintain the web sites in my opinion. And also, Stack Overflow relates to any programming, but even though web design can also be classified as programming, I feel that it deserves to have its own stack exchange. Apart from this, Graphic Design can mostly relate to designers, whether it is for stuff like logos, or any other graphics not necessarily web sites. This is only for people who want to ask about making websites.