Blue Charcoal

#040A1E

General Information

The hex color #040A1E, also known as Blue Charcoal, is a very dark shade of blue with subtle hints of gray. In the RGB color model, it is composed of 1.57% red, 3.92% green, and 11.76% blue. Its primary characteristic is its extremely low luminance, making it appear almost black. In terms of color theory, Blue Charcoal evokes feelings of sophistication, mystery, and calmness. It is often used in design to create a sense of depth and elegance. Due to its dark nature, it is crucial to consider accessibility when using this color, particularly in digital applications. Careful consideration must be given to contrast ratios to ensure readability and usability, especially for individuals with visual impairments.

The hex color #040A1E, also known as Blue Charcoal, presents significant accessibility challenges, particularly in text-based applications. Its extremely low luminance value of approximately 0.004 makes it difficult to distinguish from black, resulting in poor contrast against most background colors. According to WCAG (Web Content Accessibility Guidelines), a contrast ratio of at least 4.5:1 is required for normal text and 3:1 for large text against its background to meet AA compliance. Blue Charcoal falls far short of these recommendations. To improve accessibility, it's crucial to pair this color with much lighter hues. Consider using it sparingly for purely decorative elements or in situations where readability is not a primary concern. Implementing a contrast checker is highly advised during the design phase to guarantee accessible color pairings. Always test your color schemes with users, including those with visual impairments, to ensure usability.

Shades

Digital Color Formats

RGB
4 10 30
RGB4 10 30
Red
Green
Blue
HSL
226.15deg 76.47% 6.67%
226.1576.476.67HSL
Hue
Saturation
Lightness
HWB
226.15deg 1.57% 88.24%
226.151.5788.24HWB
Hue
Whiteness
Blackness
hex#040A1E
rgb4 10 30
hsl226.15deg 76.47% 6.67%
cmyk86.67% 66.67% 0% 88.24%
hwb226.15deg 1.57% 88.24%
xyz-d650 0 0.01
oklch0.1517 0.0443 265.69
oklab0.1517 0 -0.04
CMYK
86.67% 66.67% 0% 88.24%
86.6766.67088.24CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0 0 0.01
000.01XYZ
X
Y
Z
OKLCH
0.1517 0.0443 265.69
0.15170.0443265.69LCH
Lightness
Chroma
Hue
OKLAB
0.1517 0 -0.04
0.15170-0.04LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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