Only seen white before.
edit
Response from vendor:
Hi
It's all 2C-B HCl. My novel method sometimes leave residues of a harmless starting chemical in the final product. This chemical reacts with air to a pinkish color. It can be removed with washing with acetone, but I can frankly not be bothered as it constitutes less than 3-5% of the product and has no 'medical' effect.
Hope this is helpful!
Best regards,
LiC
Never have myself, all the powder i have got has been white. Quick google search didnt really show anything either.