Time for the "Blues":
Blues
Blue means, simply, cold (or extreme cold).
[4.] Cryogenic Vault
Placed inside the safe and basic living (pressurized) place (in the form of the continuous red border) it now appears (depicted) an equilateral triangle "pointing" downwards (which suggests a force or effect concentrating/focusing on what lies below). As blue means "lowered thermal conditions" it can be assumed to signify that cold is applicable (or applied) to whatever is pointed by said triangle.
Near the bottom, it appears a, now, familiar figure (see Reds) that is assumed to signify “human (being)” (and an alive one, as is in red). Its relative position is new, though, as appears parallel to the "floor" (as seen previously). This can be "interpreted" as "human being lying down”. So. In short: alive human being, lying down, with cold (or extreme cold) applicable (or already applied) to her/him. All in all, a fairly apt depiction of a/the cryogenic facility.
[19.] Refrigeration
This one is a great example of parsimony and simplicity, without losing anything in effectiveness and in expressiveness. Inside the, now (again) familiar, protective outer layer (the red one) it now appears a new, also, all encompassing, layer. This time in blue. In short: lower(ed) temperature in the livable environment. Simple. Effective.
