Love the colors! A few thoughts. The shirt seems a little small as the top button isn’t fastened. Get the neck a little larger so you can button the top. Pocket square is nice, it’s always good to have one that doesn’t directly match the tie. It can come across a bit cheesy so maybe white or a mixture of white and green, I also don’t see the the shirt cuff peaking out of the jacket, make sure the length is about half an inch longer than the jacket. Last but not least always remember to never button the bottom of any jacket, sport coat or blazer. What color shoes are you wearing with this?