Blue Charcoal

#040717

General Information about Blue Charcoal

The hex color code #040717, also known as Blue Charcoal, is a very dark shade of blue, almost black. It is composed of 1.57% red, 2.75% green, and 9.02% blue. In the RGB color model, this translates to the values R:4, G:7, B:23. The CMYK representation of #040717 is C:83, M:70, Y:0, K:91. This color is typically associated with feelings of calmness, depth, and sophistication. Due to its dark nature, it is often used in backgrounds or as an accent color when a sense of elegance and subtlety is desired. The color is rarely used in a place where readability is important, due to the fact that you would need a very light color to be able to contrast the dark color and still be read.

The hex color #040717, also known as Blue Charcoal, presents significant accessibility challenges, especially in text-based contexts. Its extremely low luminance value means that it provides very little contrast against most background colors, particularly white or light shades. According to WCAG guidelines, sufficient contrast is crucial for readability and usability, especially for users with visual impairments. To ensure accessibility, this color should be paired with a very light color for text or interactive elements. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Using tools to check contrast ratios is highly advisable when implementing this color in web design. Employing techniques like text shadows or borders can sometimes help improve legibility but should not be the primary solution. Thoughtful consideration of color combinations is paramount to avoid creating barriers for users.

Shades

Digital Color Formats

RGB
4 7 23
RGB4 7 23
Red
Green
Blue
HSL
230.53deg 70.37% 5.29%
230.5370.375.29HSL
Hue
Saturation
Lightness
HWB
230.53deg 1.57% 90.98%
230.531.5790.98HWB
Hue
Whiteness
Blackness
hex#040717
rgb4 7 23
hsl230.53deg 70.37% 5.29%
cmyk82.61% 69.57% 0% 90.98%
hwb230.53deg 1.57% 90.98%
xyz-d650 0 0.01
oklch0.1356 0.0365 269.87
oklab0.1356 0 -0.04
CMYK
82.61% 69.57% 0% 90.98%
82.6169.57090.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0 0 0.01
000.01XYZ
X
Y
Z
OKLCH
0.1356 0.0365 269.87
0.13560.0365269.87LCH
Lightness
Chroma
Hue
OKLAB
0.1356 0 -0.04
0.13560-0.04LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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