What is the history text called in the Polaris theme style sheet?

[Scott29]

I am trying to figure out where in the style sheet the black text pictured below is listed in the colors style sheet, under ux theme. Does anyone know the name of that line item?

[Scott29 · Accepted solution]

I ended up finding it by brute-forcing it, the line item is called "--now-unified-nav_menu-sublabel--color".