1. a person or thing that colors; something used to add color
Usage: often used in compounds (e.g., food colorer); less common than 'coloring' or 'colorant'

Examples

• The baker used a food colorer to tint the frosting blue.
• A skilled colorer can enhance a black-and-white photograph.
• The fabric colorer applied the dye evenly across the material.
• Natural colorers like beet juice are becoming more popular in baking.