Introduction of Shocking Monochrome

I gave name of the theme ” shocking monochrome” in my own words.
the definition of Monochrome has difference meaning.
for example
a. A picture, especially a painting, done in different shades of a single color.
b. The art or technique of executing such a picture.
c. The state of being in a single color.
d. A black-and-white image, as in photography or on television.

I often see some photo or artwork in Monochrome a single color which is usually black and white or gray.
but many artist developed their works with combining gray and shocking color which is I like most. I think this style of color make the artwork become so dramatic and expensive.