Memorial tattoo help please!!!!

Hey all. Iv been trying to figure out what I want for my memorial tattoo and I'm having trouble figuring it out. I know for sure I'm getting his footprint which you can see is just about the size of my finger. I also want to get his initials at the least which are NJA (Noah James Allan) and the day I lost him. Iv been trying to figure out how to incorporate blue into the tattoo whether it's a small symbol or his initials are in blue or anything. Please give me some ideas if you can think of any! This is really important and I just want to make sure it will be perfect for my first little angel💙 thank you to anyone who can help! I also added a pictures with the ultrasounds if it could help any.