tsìng-siak正色

pure colors

pure colors; cardinal colors (blue, yellow, red, white and black); stern and serious facial expression; to adopt a stern countenance

English Wiktionary, “正色” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%AD%A3%E8%89%B2 · confidence: Medium (Wiktionary, Hokkien)