Interesting. I guess I need to think about re-planting, then. We miss the vibrant colors!

Many of the older, large leaf Crotons lose their color as they age. You can try cutting it back, but usually once the color fades it won't return.

Are you sure there is not some fungus involved? I wonder about some of the leaves which look spotted. (But, I don't know "Bravo" cultivar.) I do know that when I moved a croton just a few feet into deeper shade it grew much more robustly.

Not an expert but Irma might be right. I think I see some black sooty mold on a few of the leaves ( but its not real clear if that's what I'm seeing ) hard to tell...

My croton got a bad case of black sooty mold last year and I had to spray it with fungicide and some all season's oil spray and eventually just ended up cutting it way back...the new growths seems to be free of it now...I do spray it once a month or two during the rainy/humid season to try and prevent it...

The Best way to check is rub your fingers on the leaves or get some white paper towel and wipe it off...if you see black ink, some what greasy looking substance you might have it...Good luck!

It should be easy to tell if that's mold. Does it rub off?

Check for croton scale also, Christopher. Quite rampant in South Florida and can create the sooty mold problem that turns them dark.

Thanks so much, everyone, for the input. I rubbed the leaves and, yes, a little bit of black soot rubbed off, but very little. Mostly the leaves are just black.

To your point, annafl, I do see what I think is scale (lots of bumps) on the undersides of the leaves.

I'm anxious to treat this but considering how much of the plant is already black I wonder if it's not a goner at this point. Should I be looking to use a fungicide? Reccomendations?

This one website recommends Horticultural oil or Neem oil...both has worked for me. If your plant is large and you don't mind cutting it back...I would do that before spraying/treating...less you'll have to treeat. Make sure you spray underneath the leaves well also...

https://patch.com/florida/brandon/sooty-mold-an-unsightly-problem-with-a-simple-solution