Faenors7
They [the Alethi] are tan.
Brandon Sanderson
You're not wrong for your observation, here, /u/Faenors7. When I saw them, I noted to Isaac that the skin tone for the Alethi in the cards [Stormlight Archive Playing Cards from the Way of Kings Leatherbound Kicksterter] was a touch darker than I imagined. But it was within the variance (I'll explain below) we imagine for the Alethi, so I decided here that we should leave it.
The reason is that we've allowed a lot of leeway to artists in their depictions. If they paint everyone looking white, we speak up, and we usually show them some of our guides of models and pieces of art we think are on target for character designs.
However, I haven't wanted to have a strict skin tone guide. Thing is, most Rosharans don't look at skin tone so much as eye color and hair color. It isn't that they ignore skin tone, but it isn't the same for them as it is for us, in part because a lot of cultures (like the Alethi and the Vedens) have a wide range of skin tones.
It's something I think we (myself included) are a little blind to in American culture. Like, we call someone black if they (like President Obama) are of a mixed race heritage. This is partially because of our particular biases. But what makes someone black is actually pretty nebulous as a skin tone shade when you look at the wide variety of black skin tones. The same goes for what ethnicity we consider white, when a hundred and fifty years ago, the more olive-skinned European people's would have not been lumped into that group.
I often point to India as a good example of what you might find in Alethkar--you find a ton of skin tones across the sub-continent, and they're all Indian. Same for the Alethi. And I don't spend a lot of time talking about whose skin tone is darker, and whose is lighter, within that range.
So when we get back something like these cards--and this is how the artist views and imagines the characters--we roll with it, offering little pieces of feedback here and there. (We had her make tweaks to Adolin, for example, to get him closer to how I imagined him.) Same for the poster--which has the Alethi characters with lighter skin, closer to what we'd see on a Japanese person on Earth.
This might be the wrong path, and I'd appreciate feedback on it. I do want to be careful not to whitewash characters (something I've had trouble with before in cover art) but I also worry if we focus too much on exactly how dark or light the skin of these characters are, we're missing the point a little. I believe in letting people who read the books imagine the characters as they would like, with me providing some guidance. It's a central theme to me in how I perceive the author-reader relationship.
This was why I was hesitant at first to even have depictions of characters in the books. (And why I liked the first cover of the US edition so much.) As we've moved along, however, I've taken a different tactic--that of admiring, and even including, different depictions from different artists, letting variety (hopefully) let the reader imagine as they want.
Sorry for the long post. It's a topic that keeps coming up, so I thought I should say something more definitive. Hopefully, people can keep a link to this post in their pockets whenever discussions about this pop up.
LewsTherinTelescope
I guess I must've misremembered a quote of you talking about them as darker. Oops.
Brandon Sanderson
Well, you're probably not remembering wrong. I've been asked before if the Alethi skin tone is darker than, say, a person from Japan might have. And I'll usually say, yes--in general they are. But I also think it's all right to paint them like a modern day Earth person from that region, as that's often what artists will use for a model or reference. So in general, if you saw an Alethi person, you'd think, "Asian person, with tanner skin than most." But that's imagining an average Alethi, with some having a darker tone, and some having a lighter one.