Fernando Borretti
I am always saying this.
GOON MASTER SOPHONT SIMP
A transhuman whose body is made entirely out of diamondoid nanomachinery would have “flesh” that strongly scatters all light, giving a whitish color that may also feature iridescence from all the hundred-nm scale components spaced at regular intervals. Cut open one and you may find an organic expanse with an appearance somewhere between an opal and chip die. The specific color from a viewing angle may also change based on the motion of the nanomachinery, creating a noticeable shimmer if they operate slow enough.