Black Rock

#150331

General Information about #150331

The color #150331, often referred to as 'Black Rock,' is a very dark shade of purple, almost appearing black to the naked eye. It has a very low saturation and luminance, placing it firmly in the realm of near-blacks. In the RGB color model, it is composed of 8.24% red, 1.18% green, and 19.22% blue. This makes it a deep, cool-toned color reminiscent of dark stones or the night sky just before dawn. Because of its low luminance, it is often used to evoke feelings of mystery, sophistication, and solemnity. It is a color that can be found in natural elements, which makes it reliable for designs that attempt to emulate nature. In design contexts, Black Rock is often employed as a background color or as an accent color to provide a sense of depth and contrast when paired with lighter colors. It works best when the goal is to add a touch of seriousness or drama to a composition.

The hex color #150331, often referred to as Black Rock, presents significant accessibility challenges due to its extremely dark nature. Its low luminance creates a very poor contrast ratio against typical light-colored backgrounds, such as white or light gray, which are commonly used for text and interactive elements. This lack of contrast makes it difficult for users with visual impairments, including those with low vision or color blindness, to discern content effectively. To ensure accessibility, it is crucial to pair #150331 with very light colors that meet WCAG (Web Content Accessibility Guidelines) contrast ratio requirements. A contrast ratio of at least 4.5:1 for normal text and 3:1 for large text is recommended to provide an adequate level of readability. Furthermore, avoid using this color for critical interactive elements without proper contrast, and always provide alternative ways for users to access the information, such as tooltips or labels with sufficient contrast. Testing with accessibility tools and users is vital to validate the actual accessibility of any design incorporating this color.

Shades

Digital Color Formats

RGB
21 3 49
RGB21 3 49
Red
Green
Blue
HSL
263.48deg 88.46% 10.2%
263.4888.4610.2HSL
Hue
Saturation
Lightness
HWB
263.48deg 1.18% 80.78%
263.481.1880.78HWB
Hue
Whiteness
Blackness
hex#150331
rgb21 3 49
hsl263.48deg 88.46% 10.2%
cmyk57.14% 93.88% 0% 80.78%
hwb263.48deg 1.18% 80.78%
xyz-d650.01 0 0.03
oklch0.1754 0.0856 294.7
oklab0.1754 0.04 -0.08
CMYK
57.14% 93.88% 0% 80.78%
57.1493.88080.78CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.01 0 0.03
0.0100.03XYZ
X
Y
Z
OKLCH
0.1754 0.0856 294.7
0.17540.0856294.7LCH
Lightness
Chroma
Hue
OKLAB
0.1754 0.04 -0.08
0.17540.04-0.08LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons