Fiancé's Attire help

Hello everyone!
My fiance has finally decided that it's time to go and look at suits. He found one that he loves and I absolutely hate. Our wedding colors are emerald, berry, and gold. The girls are wearing the green. He wants to wear a burgundy suit. I've told him that it won't go with our wedding colors and he's been arguing over it for weeks.

Now he's mad because my mom had said something along the lines of that looks nice to him in order to not hurt his feelings and she also hates it. My bridesmaid that is really good friends with him isn't the biggest fan of it either. Now he's been sulking and saying to me "no, you just pick what you want". I want him wearing something he feels confident in, but want it to look good in the pictures. He picked out our photographer who is incredibly expensive and I want the pictures to look nice.
I've had to do literally all of the wedding planning with the exception of 2 emails that he's sent. I'm getting stressed and frustrated and when I told him why I was scared to tell him no, he just said "okay". How do I get him wearing something that looks nice, but also makes him feel happy and confident?