I think Kendall Charcoal looks best with Lucy. But when looking at pictures online, you're guessing. Get a large sample of KC from Samplize.com and look at it next to the sample board for the flooring options. Then, if you can before the builder orders the floor, ask him to show you a box of your choice. Lay out several boards on the floor so you get an idea of how it's going to look on a larger area. Sometimes sample boards aren't exactly like the real thing either. There are posts on this forum from people who were disappointed because of this.

But I would spring for real wood on the first floor, stairs and upstairs hallway, and carpet in the bedrooms. Think about how difficult it is to replace flooring while you're living there. It's equivalent to having to move out. Nothing beats the attractiveness and durability of real wood.