We haven’t had much photography on the blog recently, so here are some gorgeous early colour photographs from the beginning of the 20th century.
According to the comments (and a bit of googling), the French replaced the horizon blue with khaki because the blue was too obvious to the enemy.
I especially love that first photo – I have some fabric which looks just like it! https://www.etsy.com/listing/121431784/up-in-the-air-a-notebook
It’s very Jules Verne-esque!