Here are some pre and post wash pictures of my 21BSP. I think I've had them about two and a half years, although they were worn on and off over that time. Not sure how many washes, probably between 6 and 8. Unfortunately they've shrunk continuously even after the first two washes, and I've gained a bit of weight too, so they're too tight for me now. A pity, because they were just getting nice and had a lot of life left. These would have looked fabulous after another year.
The color was hard to capture, it definitely changes a lot depending on light source. While being very rich indigo, they're not as intensely blue as the pictures in direct sunlight would suggest. True color is somewhere between the color of the first and last photos, but being closer to the last photo.
Post-Wash (looks weird to me due to lack of creases, but gives a good idea of the fading)