Final answer:
The warm tones seen within natural hair color are referred to as undertones. Undertones are the underlying colors that give hair its unique shade and can be enhanced or minimized with hair coloring techniques.
Step-by-step explanation:
The warm tones seen within natural hair color are referred to as undertones. Undertones are the underlying colors that give hair its unique shade and can range from warm (red, orange, or gold) to cool (blue or violet). These undertones create depth and dimension in the hair and can be enhanced or minimized with hair coloring techniques, such as highlights or lowlights.