Mince has changed colour,is it safe?

[Bingowin]

I've got a pack of beef/pork mince which was red as usual when I bought it.

It's now gone very pale and the use by date is today. Can I stick it in the freezer and use another time (not for around to cooking it) or should I chuck it?
I haven't got time to take it back so just need to know if it's safe or not.
I've read differing opinions online.

It will go brown as the oxygen oxidises the meat touching the air, but pale sounds a bit dodgy

Inwould chuck it if i wasnt sure, as it is mince and that is the highest risk type of meat as it has been handled so much