She looks just like my old girl, Valentine. My girl colored up after about 2 weeks. Her body was pink with dark red fins. she was so precious. A lot of baby bettas from chain pet stores such as petco don't live very long though. my girl passed away at 8 months. Im obviously upset about her dying but I rest easy knowing that I gave her a good life while it lasted. I wish your betta a long and healthy life with you!
I got Squeaky as a baby as well. She had little colour but changed as she aged. She is the sweet face in my profile pic. Be sure to read the post on baby betta care (it is a bit more intensive than an adult).