IPA: /ˌmɒnəˈkrəʊmɪk/
KK: /mɑːnəˈkroʊmɪk/
Having only one color or shades of one color.
The artist chose a monochromic palette for the painting, using only shades of blue.
Monochromic → It is formed from "mono-" (meaning one) and "chroma" (from Greek χρῶμα, meaning color). The word "monochromic" refers to something that has one color.
Think of 'mono-' meaning one and 'chroma' meaning color — that's why monochromic describes something that is of one color.