*love* the woven wood shades. They come in so many colors & textures now, and you can get them with banding on the edges for a finished look. And they're very popular at the moment. You can also get them with a liner for added privacy, insulation and...
A cocoa color would be fashionable and add warmth to the room. 10 years ago I started using darker colors against much advice to stick with lighter colors. I find the darker shades to be warmer and add to the entire ambiance of the room. Even darker ...
I don't know if you can switch them out without seeing the chandelier however, the shades that are sold for these pieces have clamps that are meant to fit on the bulbs.