Blue Charcoal

#051218

General Information about #051218

The hex color #051218, also known as Blue Charcoal, is a very dark shade of blue. It is composed of 2% red, 7.1% green, and 9.4% blue. In the RGB color model, it has the values (5, 18, 24). In the CMYK color model, its values are 79% cyan, 25% magenta, 0% yellow, and 90.6% black. This color is often associated with sophistication, mystery, and depth. Its subtle blue undertones differentiate it from pure black, adding a touch of richness. Due to its low brightness, it's best used in situations where a dark, understated color is desired, or as a background color paired with lighter, contrasting text or elements to ensure readability. Its nuanced character makes it a versatile choice for creating a sense of elegance and depth in various design applications.

The hex color #051218, also known as Blue Charcoal, presents significant accessibility challenges, particularly for users with visual impairments. Its extremely low luminance value results in very poor contrast against white or light backgrounds, making text or interface elements nearly invisible. According to WCAG guidelines, sufficient contrast ratios are essential for readability and usability. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. #051218 fails to meet these standards when paired with typical light colors. To improve accessibility, it is crucial to use this color sparingly, and always in conjunction with very light or vibrant colors that provide adequate contrast. Consider alternative, lighter shades of blue or charcoal that offer better contrast, or use tools to evaluate color contrast and ensure compliance with accessibility standards. Furthermore, providing alternative text descriptions for images and ensuring keyboard navigation are essential practices to enhance overall accessibility when using such a dark color.

Shades

Digital Color Formats

RGB
5 18 24
RGB5 18 24
Red
Green
Blue
HSL
198.95deg 65.52% 5.69%
198.9565.525.69HSL
Hue
Saturation
Lightness
HWB
198.95deg 1.96% 90.59%
198.951.9690.59HWB
Hue
Whiteness
Blackness
hex#051218
rgb5 18 24
hsl198.95deg 65.52% 5.69%
cmyk79.17% 25% 0% 90.59%
hwb198.95deg 1.96% 90.59%
xyz-d650 0.01 0.01
oklch0.1729 0.0231 228.22
oklab0.1729 -0.02 -0.02
CMYK
79.17% 25% 0% 90.59%
79.1725090.59CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0 0.01 0.01
00.010.01XYZ
X
Y
Z
OKLCH
0.1729 0.0231 228.22
0.17290.0231228.22LCH
Lightness
Chroma
Hue
OKLAB
0.1729 -0.02 -0.02
0.1729-0.02-0.02LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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