Vulcan

#18181D

General Information about #18181D

The hexadecimal color #18181D, often referred to as "Vulcan," is a very dark, desaturated shade of blue-gray. It belongs to the family of near-black colors and possesses a low luminance value, making it appear almost black to the human eye. In the RGB color model, #18181D is composed of 9.41% red, 9.41% green, and 11.37% blue. Its primary characteristics include its subtlety and understated nature, lending itself to applications where a dark, neutral tone is desired. Because of its proximity to black, it's frequently used to create shadows or darker gradients. The color's name, "Vulcan," hints at its association with the Roman god of fire and metalworking, possibly reflecting its connection to dark, metallic tones. It is often seen as a modern and sleek color.

The hex color #18181D, also known as Vulcan, presents significant accessibility challenges, especially when used for text or interactive elements. Its low luminance value of approximately 4.4 cd/m² falls far short of the WCAG (Web Content Accessibility Guidelines) recommended contrast ratios. For normal text (size 14 points or 18 pixels and below), a contrast ratio of at least 4.5:1 is required against its background. For large text (14 points bold or larger, or 18 points or 24 pixels and larger), the minimum contrast ratio is 3:1. Given the darkness of #18181D, pairing it with lighter colors is essential to ensure readability and usability for individuals with visual impairments. Without sufficient contrast, users may struggle to distinguish text from the background, leading to a degraded user experience. Tools like contrast checkers can help evaluate color combinations and ensure compliance with accessibility standards. Therefore, web developers should carefully consider the color pairings and provide alternative color schemes if necessary to meet accessibility requirements.

Shades

Digital Color Formats

RGB
24 24 29
RGB24 24 29
Red
Green
Blue
HSL
240deg 9.43% 10.39%
2409.4310.39HSL
Hue
Saturation
Lightness
HWB
240deg 9.41% 88.63%
2409.4188.63HWB
Hue
Whiteness
Blackness
hex#18181D
rgb24 24 29
hsl240deg 9.43% 10.39%
cmyk17.24% 17.24% 0% 88.63%
hwb240deg 9.41% 88.63%
xyz-d650.01 0.01 0.01
oklch0.2113 0.0098 285.5
oklab0.2113 0 -0.01
CMYK
17.24% 17.24% 0% 88.63%
17.2417.24088.63CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.01 0.01 0.01
0.010.010.01XYZ
X
Y
Z
OKLCH
0.2113 0.0098 285.5
0.21130.0098285.5LCH
Lightness
Chroma
Hue
OKLAB
0.2113 0 -0.01
0.21130-0.01LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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