BEDROCK is the canvas of SPICE, it is the backdrop, the environment, the entire coherent, consistent whole upon which the feel rests. BEDROCK is meant to disappear and blend deep inside the mind of the audience. This is both one of the prerequisites of realism and a necessity of readability. It is the boring the unseen, the omnipresent.
Blade Runner is a striking exemple, the blue haze, the holograms, the endless night and rain, those form the bone, the solid predictable backdrop of the world. The BEDROCK upon which elements can gain contrast and value, this is why the Roger Deakins interior set pieces in Blade Runner 2049 with warm bright swirling lights have such profound power, because of the backdrop of darkness and rain the SPICE can shine.
If nothing is boring then everything is boring.