Walkers give reason why cheese and onion crisp packets are blue - Liverpool Echo
What explains the collective British memory of salt and vinegar, and cheese and onion crisps swapping packet colours in the 1980's? Apparently this never happened but I think I remember it. -
Walkers crisps astonishes fans with myth-busting crisp packet info | Express.co.uk
Why Walkers cheese and onion crisp packets are blue and not green - Leicestershire Live
WALKERS CRISPS CHOOSE YOURS FRENCH FRIES SALT VINEGAR CHEESE ONION READY SALTED | eBay