Yasopp and Usopp, yes, they're meant to be black. Usopp would be African if he were real and they were cast with black actors in Live-Action. Blackbeard is also meant to be black, he would from Somalia if he was real. There are many characters in One Piece who are intentionally and clearly coded as black, and I agree that the anime continuing to color their skin tone lighter is racist.

But Kuzan isn't black. He's just based on a Japanese actor who coincidentally happened to have black features.

He had no time to react. All he knew was that his face was instantly covered in a disgusting pie. Wiping away what he could, he calmly sat at his desk, staring down the anon. He wasn't angry...just disappointed.

@speed-is-knowledge liked for a starter | for Kizaru

"Hey, are you okay?" The redhead approached the stranger, sensing the strong iron smell of blood, although unfortunately she could not identify if the blood was his or another person's, impregnated on his clothes. She could sense that the person was incredibly tall, however, she couldn't tell if he was a pirate like her or a Marine. Regardless of that, as a doctor, she wanted to help "I'm a doctor, I can help you if you need it"