Hey,
I just posted to another thread, but it made me realize how much colors can change from neonate to adult (I'm sure you're well aware), check this out of Mimosa. Started off very orange like your Mango baby on steroids then went RED.
I wonder what baby mango-'roids will look like...? I'm sure your husband will not let you part with it, I'll be interested to see what it looks like going forward.
I am suspecting the orange will shift to red as he matures, but time will tell. I take a lot of photographs, so that process will be captured if it occurs as predicted.