Add a faux wood plank ceiling or faux wood beams for the ceiling.

Add an outdoor rug

Also in FL. For our lanai ceiling our builder used Cypress, stained on site to coordinate with our wood floors inside.

We've been in for 3 years and they still look brand new. We also have it on the ceiling of our 10' x 10' front porch.

I think you've made a great mistake with your selection of gray outdoor furniture.

A selection in earth tones might might be more interesting.