I see your
After breaking an image into pixels, one assigns numbers to each pixel
One can use a single bit to represent black or white
An 8-bit scanner or monitor can distinguish 256 shades of gray or colors
In a 24-bit scanner, 8 bits are used for each primary color (red, green, blue), giving a total of 16,777,216 colors
This is called “true color.” It’s close to what the human eye can discern.
Still one sees many adds for 32-bit color