As for the main background colour? Hard to name. But a quick poll in the office brought responses of “trout”, “two shades of grey”, “porpoise”, and a “sad teal” 🙁.
In 2013 we decided we’d go black and yellow, launching a much refreshed site that brought the most popular links to the fore.
At the time it was the first local government site to be responsive - meaning the design reformatted to better suit the size of the device you were using.
We also had a weather icon for a while, too.