It was a picture book, I think I had the paper back copy.
It was about a man who lived on a street of houses that all looked the same and were a bit sad and maybe grey. I think there was a picture of working men’s cottages.
The man paints his house a bright colour. Then all the neighbours paint their houses bright colours. Then everyone is happy! There might have been something about a rainbow in the book. There was a lot of shire on the cover.
I read it in the early 70s but I imagine it was second hand.
Thank you!