Today I bought a new camouflage shirt to wear in the summer when my jacket gets too hot.
Everyone knows that your clothes should be a drab green or brown (or in my case a mixture of the two with pictures of leaves on) so that you blend into the background and the wildlife can’t see you.
While I was out I also bought some batteries for my red LED torch, because everyone knows that badgers cannot see red light.
Hang on a minute. These two statements don’t really go together. If badgers don’t see the colour red, does that mean that red is the best colour for badger watching clothes? Why didn’t I just buy a red shirt and trousers? I’d be invisible to badgers then. I wonder if anyone has ever tried this?
The truth is that camouflage is a complicated subject, and I’m sure a lot of it comes down to personal preference. Is camouflage really necessary for watching badgers and other wildlife? I honestly don’t know. All I can say is that I wear it because I feel more confident that I can’t be seen, and that confidence is important if you’re going to spend hours in a tree waiting for a wary animal to show itself.
Tales from the Wood - The Diary of a Badger Watching Man 
I’ve researched quite a bit into this but only in respect of deer, who don’t really mind if you’ve got a red shirt on. But they do see the blue and ultra violet colours quite well. I’d like to research more into what badgers and foxes see.
As an aside I’ve used a camera flash and white light on my badgers and they don’t flinch an inch.