Blue Charcoal

#001018

General Information about Blue Charcoal

Blue Charcoal, represented by the hexadecimal color code #001018, is a very dark shade of blue. It belongs to the family of blue colors, characterized by its low saturation and luminance values. In the RGB color model, it is composed of 0% red, 6.27% green, and 9.41% blue. The CMYK color model, used primarily in printing, represents Blue Charcoal as 100% cyan, 34% magenta, 0% yellow, and 91% black. This indicates that the color is created by a near-complete absence of reflected light. Blue Charcoal evokes a sense of depth, mystery, and sophistication. Due to its darkness, it is often used in designs where a subtle and understated background is desired. Its hexadecimal notation allows for precise digital reproduction across various platforms and media. The color is closely related to other dark blue and black shades, offering a variety of tonal options for designers and artists.

The hex color #001018, also known as Blue Charcoal, presents significant accessibility challenges, especially in text applications. Its extremely low luminance value of approximately 0.004 makes it very difficult to read against a standard white background. According to WCAG (Web Content Accessibility Guidelines) standards, it fails all contrast ratio tests for normal text, large text, and graphical elements. This means that individuals with visual impairments, including those with low vision or color blindness, will struggle to perceive content displayed using this color. To improve accessibility, it is crucial to pair #001018 with significantly lighter colors that provide sufficient contrast, such as shades of white, light gray, or even pale yellows. A contrast ratio of at least 4.5:1 for normal text and 3:1 for large text is recommended to meet WCAG AA compliance. Careful consideration of color combinations is essential to ensure that web content is usable and inclusive for all users.

Shades

Digital Color Formats

RGB
0 16 24
RGB0 16 24
Red
Green
Blue
HSL
200deg 100% 4.71%
2001004.71HSL
Hue
Saturation
Lightness
HWB
200deg 0% 90.59%
200090.59HWB
Hue
Whiteness
Blackness
hex#001018
rgb0 16 24
hsl200deg 100% 4.71%
cmyk100% 33.33% 0% 90.59%
hwb200deg 0% 90.59%
xyz-d650 0 0.01
oklch0.1615 0.0314 227.54
oklab0.1615 -0.02 -0.02
CMYK
100% 33.33% 0% 90.59%
10033.33090.59CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0 0 0.01
000.01XYZ
X
Y
Z
OKLCH
0.1615 0.0314 227.54
0.16150.0314227.54LCH
Lightness
Chroma
Hue
OKLAB
0.1615 -0.02 -0.02
0.1615-0.02-0.02LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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