Colored with watercolors! I love the feel of these, and the way they match the style. I went with a bit of a different color scheme than I was initially thinking of. Decided for blue at the suggestion of my sister, and I think it works rather well.
Here is a painting I made from observation on the top of Mont Bélair in Canada, just before sunset.
I am painting those in a 5x8 very convenient moleskin watercolor book. I previously eyeballed the dimensions of this book at 4x6 when I had no ruler to verify but I was slightly wrong. Now the info is exact. :)