Office Mood Board, Round 1

I'm in the process of redesigning my office. The only thing I'm planning on keeping is the wall color. Currently, I'm refinishing a desk that used to be in my brother's room with a natural butcher block-esque top and an oil rubbed bronze bottom half with drawers (the same color as my entry buffet). So I've got a black/gray/natural palette going on-now I just need to come up with pops of color in accessories. We are considering a sofa bed, since our guest room is currently occupied. Here is the start of my brainstorming. I like the idea of pairing the dark-ish furniture with the yellows. I'd probably recreate a pair of drop cloth curtains for this room as well.