I am always looking for unusual SAK scales (materials, designs, colors). A couple of days I found a Spartan with light blue scales which I had never seen before. Turns out at least four shades of blue exist in 91mm, of which only one is actually found on regular knives (with item number codes ending in .2).
Edit (20170501): I think the Bosch-branded scales are yet another shade of blue. I’ve never compared them.
From left to right: Light blue, “Regular” blue (Cobalt blue?), “Sparkly” blue, Festool Midnight blue.