It's just the default phproxy layout with different colours? Like iowadawg said - there's a million proxy sites out there so why should someone visit yours over any other?
You make a valid point but I'm going to play devil's advocate here. People will visit any proxy site because 999,000 of that million are blocked. Most proxy users care only about utility. That said, branding & customization will definitely increase the stickiness and quality of the site but there are still many successful proxies that look like crap.
Some proxy users visit my proxies site from google even when my site position is 300+ on their searches. So yeah, lots of top proxy site are already banned.
Ok, the problems with corners are still there. The orange-turquoise is contrasting, but are too bright also. Light blue on blue is not readable. Use white if you want to keep the background dark.
does your host allows you to make space for this kind of site? what hosting service are you using? you might want to double check your terms of agreement with them.... not to scare you off... just a gentle reminder... it's better to confirm that to get banned...