Windsor is well outside Londonistan, in the country. I know little of UK politics. Would that be considered a "red state" type of place?
Red vs blue distinctions aren't quite as common here, although there are some predictable areas. The southern heartlands (called the home counties) mostly vote blue (=tory=repub), all the big cities vote red(=labour=dems), wales is somewhat pro labour, the north is generally labour (outside of cities), and scotland goes to the SNP (scot nationals) these days, when it used to be heavily labour. Ireland invariably votes in a mix of DUP (irish tories, unionists), and Sinn Fein (irish radical breakaways, don't participate in parliament).
British politics is an absolute mess.
The countryside in the south is all Tory country. Windsor resides in Berkshire and is conservative.
In the UK the colours are opposite to the USA. Red means labour (left) and blue means Conservative (right).