Final answer:
Shades EQ has categories of Natural, Ash, Gold, and Red which refer to different tones of hair color.
Step-by-step explanation:
The categories of Shades EQ are Natural, Ash, Gold, and Red. These categories refer to different tones of hair color that can be achieved using Shades EQ, a popular hair color product.
Natural shades provide a neutral color without any added tones, Ash shades have cool undertones, Gold shades have warm undertones, and Red shades have red undertones.