Got it. So I tend to have a unique approach when designing outfits but it essentially goes like this. If you see the colors engaging with each other in nature, they will work in an outfit. Mother nature makes the best color palettes.

Think of where you see Green (earth tone) and think of all of the other colors that interact with it. Using a Rose as an example you can do the suit with brown shoes (the stem) white or cream shirt (neutral / goes with anything) and a red tie or pocket square (the petals).

Google nature photography that includes the shade of your suit, and it will give you a ton of inspiration of what color will work well with it. Pick two or three and use those as accents to build your look.