Answer:
The answer is pointillism.
Step-by-step explanation:
As the name suggests, this technique involved the use of many different coloured dots to create the illusion of a complete image. It was mainly influenced by impressionism, and was referred to as pointillism for the first time until the late 1880's.
Pointillism is related to color theory. For this reason, it mosly uses cyan, magenta, yellow and black as its primary pigments.