sooo the male i bought with the badly torn fins is healing very nicely

. he was so badly ripped up he had almost nothing left of any of his fins, happily after treating him with a general medication from tetra he is well on his way to recovery. however the new fin tissue is completely clear as far as i can tell except for a very faint black border much like his brother. he is a beautifiul pinky red colour and has a few bluish streaks froming in the red parts of his fins i was just wondering if anyone else had a betta that healed with clear fins? or will the colour come in later? i've never had such a badly torn up betta before so am new to seeing fins grow back in.