Love mixing blue and black, and particularly LOVE blue gingham, which I wear (or abuse!) quite a bit, as shown by my blog post today! Great additional inspiration to mix it with black patterned pants. The big sweater on the third shot is awesome too.
I’m not generally a fan of navy blue and black, not because it’s a rule of fan, but because it just never looks right to me. And that’s not to say I haven’t tried. I love navy blue, I love black, but usually not together. But none of this quite fit that specific frame and I really like each picture. In particular, I love the pattern mixing in the second picture.