Help! What Bridesmaid Dress..?

You could go for a teal/sage green, these are opposite on the colour wheel so would work. if you wanted to go bold then deep purple would look good, or if you want to keep it understated then a soft grey/silver would look great. Looking at the waistcoat you could also do a pale gold as it would tie in more with his suit than silver. There are so many options, it all depends on how bold you want the colour mix. I really like the red and gold theme as is elegant and will let your FH suit stand out. You can do so much with the gold in touches like your decor, invites, cake etc

I looooove the idea of pale gold!! Thank you xx

I would go with pale gold/nude similar to his waistcoat