monochrome:1

noun
mono*chrome \ ˈmä-nə-ˌkrōm \
1662
  • a painting, drawing, or photograph in a single hue

monochrome:2

adjective
monochrome \
1839{ds||1||}
  • of, relating to, or made with a single color or hue
  • involving or producing visual images in a single color or in varying tones of a single color (such as gray)
Powered by Merriam-Webster
images meanings .com