noun
ivory-white; ivory color
Refers to the pale, creamy white color of ivory. Used as a noun or no-adjective to describe objects, fabrics, paints, etc.
彼女は象牙色のドレスを着ていた。
She wore an ivory-colored dress.
白 is general 'white'. 象牙色 is a specific shade of off-white with a creamy or yellowish tint.
Compound of 象牙 (ぞうげ, 'ivory') + 色 (いろ, 'color'). The reading ぞうげ is the on'yomi of the kanji.