Use reasoning to lead to the answer of the following question:
He was learning about the use of color and all their tints, and even how to use what technique?\nOptions:\n- black white\n- old timey\n- white black\n- dark\n- monochromatic
 Reasoning process:
User
There are various type of colors and each color has various tints. Technique of various tints of one particular color is called as monochromatic. Therefore, the final answer is monochromatic.
Assistant