A look in my pantry reminds me. We consume a lot of tuna, I do our major shopping mostly at Coles sometimes at Woolies.
Apparently I buy the "own label" brand in olive oil, which both retailers have helpfully made the "light blue with a bit of yellow" and put in the same sort of place - bottom shelf in the tuna category. I'm lazy and the person selling to me helps me be.
Not glamourous but - often - that's marketing.