noun, noun which may take the genitive case particle 'no', na-adjective
bright yellow; vivid yellow
Emphatic form of 黄色 (yellow), meaning a very intense, bright, or pure yellow. Used as a noun, no-adjective, or na-adjective.
菜の花畑が真っ黄色に染まっている。
The field of rapeseed blossoms is dyed bright yellow.
彼は真っ黄色なシャツを着ていた。
He was wearing a bright yellow shirt.
Formed by attaching the intensifying prefix 真っ (ma-) to 黄色 (kiiro, 'yellow'). The prefix 真っ is a variant of 真 (ma) used before certain sounds, yielding the meaning 'truly' or 'completely'.