This designation refers to a specific shade within a hair coloring system. The first component, “1b,” typically indicates an off-black or very dark brown natural base color. The second component, “27,” represents a tone combining medium brown (“2”) and intense violet (“7”). This combination results in a rich, dark color with violet-brown undertones.
Choosing this particular shade offers a nuanced approach to dark hair coloring, providing depth and dimension beyond a single, flat tone. It can enhance natural dark brown or black hair by adding subtle violet highlights that catch the light, creating a more vibrant and less monochromatic appearance. The violet undertones can also counteract unwanted brassy or orange tones, a common concern for those with naturally dark hair. The widespread availability of this specific color combination reflects its popularity and its effectiveness in achieving desirable results.