Best color schemes and size of website layouts

[FONT=Symbol][FONT=&quot] [/FONT][/FONT]Best color schemes and size of website
I am a web ant and explore hundreds of website weekly for designing a website. Some of these websites have wide layouts and multiple color schemes which are think not a best practice.
For example:
The best practice in web design is using a color scheme that never keeps a bad image and a layout which is not more than 80%.
Like these websites have a very bright color schemes and a perfect layout.
Reply this post if you want to add you argument.