Vulcan

#151218

General Information

The hex color #151218, also known as Vulcan, is a very dark, almost black shade belonging to the blue-red color family. It has a low luminance value, which means it reflects very little light, giving it a deep, muted appearance. In the RGB color model, it is composed of 8.24% red, 7.06% green, and 9.41% blue. The color is often associated with sophistication, mystery, and elegance. It's commonly used in designs where a subtle, understated aesthetic is desired. In smaller applications, like text-only documents, or icons, the color can be indistinguishable from black. This color could also be called deep midnight blue because of the slight tint of blue in its appearance.

The hex color #151218, also known as Vulcan, presents significant accessibility challenges, particularly in text-based applications. Its low luminance value results in a very low contrast ratio against standard white backgrounds, making it difficult for users with visual impairments to read text rendered in this color. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Vulcan falls far short of these recommendations, posing readability issues for a wide range of users, including those with low vision, color blindness, or even those viewing the content under bright lighting conditions. To improve accessibility, it is advisable to pair #151218 with much lighter colors for text or user interface elements, ensuring sufficient contrast. Alternatively, consider using darker shades of gray or black for backgrounds when #151218 is used as a primary color, thereby enhancing readability and inclusivity.

Shades

Digital Color Formats

RGB
21 18 24
RGB21 18 24
Red
Green
Blue
HSL
270deg 14.29% 8.24%
27014.298.24HSL
Hue
Saturation
Lightness
HWB
270deg 7.06% 90.59%
2707.0690.59HWB
Hue
Whiteness
Blackness
hex#151218
rgb21 18 24
hsl270deg 14.29% 8.24%
cmyk12.5% 25% 0% 90.59%
hwb270deg 7.06% 90.59%
xyz-d650.01 0.01 0.01
oklch0.1886 0.0129 307.65
oklab0.1886 0.01 -0.01
CMYK
12.5% 25% 0% 90.59%
12.525090.59CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.01 0.01 0.01
0.010.010.01XYZ
X
Y
Z
OKLCH
0.1886 0.0129 307.65
0.18860.0129307.65LCH
Lightness
Chroma
Hue
OKLAB
0.1886 0.01 -0.01
0.18860.01-0.01LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons