Moved plants into a pot now they have purple on there leaves?

I took mint and some other plants from my front yard and put them in a pot. The pot has miracale grow potting mix. So a few weeks later they all seem to have a little purple in there leaves. Is this anything bad? Here is a picture of the mint but the purple looks darker then in the picture.

thanks for your help<3

 

Mint often has a purple tinge to the leaves, that's normal. The purple is anthocyanins, same as makes red wine, and beetroot, etc., purple. Very healthy to eat too.

 

Oh thank you! umm i put freesia's in the pot too and they have purple on there leaves, is that normal?