Basic plot was that your eye colour determines your worth as a human. Brown eyes were the ruling class, grey eyes servants, blue and green eyed people were exiled/outlawed.
The book starts with a grey eyed boy who works on a farm for a Manor House. I specifically remember a passage about it being a frosty morning and he stands in a cow pat with his bare feet for the warmth. It squirmed me out as a child so I remember it!
It’s a bit of a Romeo and Juliet story with him falling in love with a girl with brown eyes and them running away (I think?)
I was but a youngster when I read this so early to mid nineties.
Any help anyone can give me would be great! I’d love to read it again, but I can’t remember its name for the life of me.