Completely filled or soaked with something, so no more can be added; or showing very deep, rich colors.
From Latin 'saturatus,' past participle of 'saturare' meaning to fill full, related to 'satis' (enough). Romans used this term for anything completely filled to capacity.
In color theory, 'saturated' colors are at maximum intensity—they're so full of color that you literally cannot add more pigment without changing the color entirely, making it a perfect use of a word meaning 'completely full.'
Complete word intelligence in one call. Free tier — 50 lookups/day.