The lower down the leg (and further from the heart) the longer it will take to heal, there's a whole thread about healing lower leg tattoos that could provide some insight. I'm posting from my phone or I'd link to it. I'd say it's a little early to start worrying just yet, the new skin that develops under a scab is slightly opaque, sometimes described as "milky," which is probably why the red seems pink right now, so just give it time before you get scared.