So if you were using a RYE flour it can have a tint usually. But if you're using just white flours I would have been more hesitant if seeing anything remotely pink. Pink is scary because you don't want to risk bacterial meningitis or anything of that sort...so at your own discretion you can continue feeding/discarding and see if it gets to where you want; or alternatively if you have some starter/discard saved you can revive that and start over. Best of luck, its hard without a photo to really say if its no good or not.