colorant

col.or.ant

n.（名词）
Something, especially a dye, a pigment, an ink, or a paint, that colors or modifies the hue of something else.
染料：给其他东西上色或修饰色彩的东西，尤其是染料、颜料、墨水或油彩
adj.Color （形容词）【色彩】
Of or being a subtractive primary color.
相减基色的或成为相减基色的