Which type of color is often used after pre-lightening to adjust the tone?

Toners are specifically designed to adjust the tone of hair after it has been pre-lightened. When hair is bleached or pre-lightened, the natural pigmentation is stripped away, which can often leave undesirable warm tones such as yellow or brassy hues. Toners are used to neutralize these tones, achieving a more desired shade. They typically contain demi-permanent or semi-permanent color that deposits color onto the hair, allowing for adjustments to the final hue without the commitment of a permanent color.

The role of developer is more about activating color during the dyeing process rather than tone adjustment after pre-lightening. Base color refers to the primary shade used to color the hair and is not specifically aimed at correcting tone issues post-lightening. Highlight refers to a technique used to lighten strands of hair but is not used for adjusting tone after pre-lightening; rather, it is an application method. Therefore, toner is the most appropriate choice for adjusting the tone of hair following pre-lightening.