Vulcan

#151720

General Information about #151720

The hexadecimal color #151720, often referred to as "Vulcan", is a very dark shade of blue-gray. In the RGB color model, it consists of 8.24% red, 9.02% green, and 12.55% blue. When represented in the CMYK color model, it is composed of 34.37% cyan, 28.63% magenta, 0% yellow, and 87.45% black. This color evokes feelings of sophistication, mystery, and depth. Its subtle blue undertones add a touch of coolness, while its overall darkness makes it a versatile choice for backgrounds and accents. In web design, #151720 can create a sense of elegance and modernity. The hexadecimal system is a base-16 numbering system, widely used in computing and digital electronics to represent colors. The first two digits (15) represents the red component, the following two (17) represents the green component, and the last two (20) represents the blue component.

The hex color #151720, also known as Vulcan, presents some accessibility challenges. Due to its dark nature, it's crucial to ensure sufficient contrast when used with text or other interactive elements. A light-colored text on a #151720 background is generally recommended to meet WCAG (Web Content Accessibility Guidelines) standards for contrast ratios. Specifically, aim for a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text (14pt bold or 18pt regular). Tools like contrast checkers can help verify compliance. Avoid using #151720 for critical interactive elements without careful consideration of contrast, as this could render them inaccessible to users with visual impairments. Using a slightly lighter tint or shade of #151720 might improve accessibility while maintaining the desired aesthetic. Always test color combinations with real users to ensure usability for the widest possible audience. Remember to provide alternative ways to convey information conveyed by color alone. For instance, use icons or text labels in addition to color coding.

Shades

Digital Color Formats

RGB
21 23 32
RGB21 23 32
Red
Green
Blue
HSL
229.09 20.75% 10.39%
229.0920.7510.39HSL
Hue
Saturation
Lightness
HWB
229.09 8.24% 87.45%
229.098.2487.45HWB
Hue
Whiteness
Blackness
hex#151720
rgb21 23 32
hsl229.09 20.75% 10.39%
cmyk34.37% 28.12% 0% 87.45%
hwb229.09 8.24% 87.45%
xyz-d650.01 0.01 0.01
oklch0.2068 0.0182 274.94
oklab0.2068 0 -0.02
CMYK
34.37% 28.12% 0% 87.45%
34.3728.12087.45CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.01 0.01 0.01
0.010.010.01XYZ
X
Y
Z
OKLCH
0.2068 0.0182 274.94
0.20680.0182274.94LCH
Lightness
Chroma
Hue
OKLAB
0.2068 0 -0.02
0.20680-0.02LAB
Lightness
Green–Red
Blue–Yellow

Alternative colors

Applications

Complementary color

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