blotting out; painting over; covering completely
Refers to the act or result of completely covering a surface with paint, ink, or another medium, often to hide or obliterate what was there before.
I blacked out the mistaken part.
I paint the entire wall solid white.
fill (graphics); flood fill; bucket fill
In computer graphics, the operation of filling a bounded area with a solid color or pattern.
I use the fill function in the paint software.