How much of a hassle is it to change your chocobo's color? I think I want mine to be red...
Also, when does that green leaf next to your name go away? I'm just about to hit level 49 and have waaaaay more than 40 hours on the clock. If I remove it, the next time I log in it's back.
Regarding chocobo color, you can use this site:
http://ffxivchocobo.com/ (from the first post!) and it basically does the work picking the color for you. You have to stable your chocobo and keep it there for a day or two for the color to take effect though.
Regarding your sprout, they extended the time requirement recently, and it will likely last you well into Heavensward if not all the way into level 60. It's honestly probably better to keep it the full duration, as from my experience players are generally more accommodating to players with the sprout icon -- more friendly, more willing to explain fights, more forgiving of bad play, etc. Your mileage may vary, of course.
But really, keep the sprout. I know you've played 40 hours, and that seems like a lot, but you still have at least that much play time, or more, ahead of you before you're caught up with the story. You're still considered very new in the community's eyes.