Vailians are described somewhat different in the game's setting books than they look in the game, but I can't currently bring you quotes. The ubiquitous black skin is more Obsidian's artists "subverting" Obsidian's own setting. I think the PDF books described them as being darker skinned than Dyrwoodans but more remiscent of a Mediterranean anthropological type, and not simply black. I blame stupid shallow racist Americans.
Josh Sawyer approved everything, no one was subverting anything.
Ocean Folk—Calbandra
(cahl-BAHN-drah, “warm ring,” Vailian)
The Calbandra originated near the equator
on the other side of the world. It is believed
that they migrated heavily due to rapid
cultural expansion in the last two thousand
years. Most cultures recognize that Calbandra
are currently the most widespread human
ethnicity in this part of the world.
Ocean folk are the dominant culture of
the Vailian Republics, though they are also
common in Dyrwood. They are rare in both
Aedyr and Readceras.
• Features: Broad, flat noses. Full lips. Round,
almond, or prominent eyes. Mid-to-shallow-set
eyes and strong brows.
• Skin: Light brown to extremely dark brown.
• Hair: Rust brown, brown, black hair.
Texture may be straight, wavy, curly, or kinky.
• Eyes: Brown, green, gray, hazel, yellow-green,
red-brown.
The more Med-like people would be the Savannah folk.