to the fireplace that is just at the right edge of the photo) and it is about 16' deep (not including the 2 bay windows along the front wall). The ceilings in this space are 10' tall, so that adds to the feeling of it being spacious.
Hope that helps!
to the paint - It's just the effect of the lighting in that space...
...which is why choosing a color based on a photo of someone elses space never works well - You're always better off selecting colors that coordinate with the elements within your own room and is appealling to you in the lighting of
Not necessarily this color but an accent color on the fireplace wall.