What tool is commonly used to apply hair color?

The correct tool for applying hair color is the tint brush. A tint brush is specifically designed for the precise application of hair color, allowing for control and even distribution. This tool typically features a flat or slightly angled bristle head which helps in saturating the hair with color while minimizing mess and ensuring that the product reaches the roots and edges effectively.

Using a comb is not suitable for applying hair color as its primary function is to detangle and style hair rather than distribute color. A hairdryer is used to dry hair or set styles but does not play a role in the application process of hair color. Scissors are essential for cutting hair but are irrelevant when it comes to the application of color. Each of the other tools serves a different purpose in hair care and styling, but the tint brush is specifically made for the task of applying hair dye.