The most common Korean word for “yellow” is 노랗다 (norata). There is one more word with a similar meaning — compare them below. 「yellow」는 한국어로 노랗다.
to be yellow
TOPIK 2 · adjective
yellow (color)
TOPIK 2 · noun
Words and levels: TOPIK I essentials (National Institute of Korean Language standard curriculum, KOGL Type 1) · examples: Cheesepotato