Bosch Fridge - do I need a higher or lower number for colder setting?

[FlamesparodyOfAChristmasName]

Got a secind hand fridge a while back, it seems too warm - do we need to change the dial (0-6) closer to 6 or closer to 0 for cooler inside?

I say 0 because going with temp 0C - 6C iyswim, DH says 6 is the colder setting. We can't tell by just trying one then the other - we fight

HELP!

Higher!

(O is off)

higher

10 is the coldest setting in my work fridge (whose temp i changed today)

ta

(you could see my logic though? please?)

Yes darling, I see where you were coming from

O is Off, Thanks, Why the designers choose to put 0 to 6???+ /- would do fine?! or warmer /colder? or red and blue visual indicator???