What type of color can be used in hair services to neutralize unwanted tones?

The correct choice is drabber because it is specifically designed to address and neutralize unwanted tones in hair color. Drabbers typically contain a formula that features specific colorants to counterbalance and minimize undesirable shades, such as yellow or orange tones, which can often appear in the process of lightening hair or when using certain dyes.

Drabber can be particularly effective for color correction, as it caters to the principle of color theory, where opposite colors on the color wheel can cancel each other out. For example, a violet drabber can help neutralize yellow tones, while a blue drabber can counteract orange tones. This targeted approach ensures that results are refined and more harmonious in the final look.

Other options, while they may have their uses in hair coloring processes, do not serve the same specific purpose of neutralizing unwanted tones. Filler is generally used to prep hair that has been lightened to prevent uneven absorption of color. Permanent color provides long-lasting results but may not effectively neutralize tones without a specifically formulated drabber. Direct dyes offer vibrant colors and can be applied without a developer, but they do not usually neutralize unwanted tones in the way that drabber is designed to do.