I'm sorry to say this, but I vote against the design.
- The circuitboard-inspired font and background with dots joining lines has nothing to do with real network diagrams.
- If you had not told us that the colors were pulled from cable colors, I would have never known. It's really too much and feels obnoxious to me; I especially dislike the color combination of the orange vote box and green accept
If you want inspiration, take pictures of a 66-block, SC-fiber end, the page header from RFC 2328, a typical network diagram, people gathered around a white board, or maybe some Cisco / Juniper hockey-pucks. Another possibility, grab a photo of an old Cisco AGS+ (you know, the router that was Cisco's first "big iron").
This site is under constant pressure from people who are clueless about networks and many times need to ask on Super User. The existing design proposal does nothing to give them a hint that they are asking in the wrong place; worse still, the design does nothing to attract the real professionals we want to attract. Please give us something that harkens back to our professional network engineering experience.
End note: in the examples above, I intentionally went with "classic technology" so there would be less worry about the timelessness of the design. I'm trying to draw from the images that launched network engineering as a profession in the 1980s and 1990s.