noun
bright colors; vivid colors
Wasei-eigo from English 'vitamin color'; used for lively, eye-catching hues often associated with health and energy.
wasei-eigo (Japanese-coined English), from vitamin color
春の新作はビタミンカラーが豊富だ。
The new spring collection is full of bright colors.
彼女はビタミンカラーのワンピースを着ていた。
She was wearing a vivid-colored dress.