Enter a color, and the tool inverts it to its RGB negative by subtracting each channel from 255.
Each RGB channel is subtracted from 255, so red 236 becomes 19. This is the same as a photo negative.
No. Inversion is 255 minus each RGB channel; a complement rotates the hue 180° in HSL. They usually give different results.
Yes — inversion is its own inverse, so applying it twice restores the exact original color.