Blue Charcoal

#040A17

General Information about Blue Charcoal

The hexadecimal color code #040A17 represents a dark shade of blue, often referred to as Blue Charcoal. It is composed of 1.57% red, 3.92% green, and 9.02% blue. In the RGB color model, this equates to R:4, G:10, B:23. The corresponding CMYK values are C:83, M:57, Y:0, K:91. This color is primarily used to evoke feelings of depth, mystery, and sophistication. Because of its darkness, it's important to use it carefully in designs, particularly when considering accessibility guidelines for readability. It is not a very common color but could be used in backgrounds and accents to other colors.

The color #040A17, also known as Blue Charcoal, presents significant accessibility challenges due to its extremely low luminance. With such a dark shade, it's crucial to ensure sufficient contrast when pairing it with text or other interactive elements. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Using white or very light colors for text on a #040A17 background is essential to meet these standards. However, relying solely on color is insufficient; consider providing alternative visual cues like underlines or icons to aid users with color vision deficiencies. Thoroughly test your designs with accessibility evaluation tools to verify compliance and ensure readability for all users.

Shades

Digital Color Formats

RGB
4 10 23
RGB4 10 23
Red
Green
Blue
HSL
221.05deg 70.37% 5.29%
221.0570.375.29HSL
Hue
Saturation
Lightness
HWB
221.05deg 1.57% 90.98%
221.051.5790.98HWB
Hue
Whiteness
Blackness
hex#040A17
rgb4 10 23
hsl221.05deg 70.37% 5.29%
cmyk82.61% 56.52% 0% 90.98%
hwb221.05deg 1.57% 90.98%
xyz-d650 0 0.01
oklch0.1455 0.0309 260.49
oklab0.1455 -0.01 -0.03
CMYK
82.61% 56.52% 0% 90.98%
82.6156.52090.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0 0 0.01
000.01XYZ
X
Y
Z
OKLCH
0.1455 0.0309 260.49
0.14550.0309260.49LCH
Lightness
Chroma
Hue
OKLAB
0.1455 -0.01 -0.03
0.1455-0.01-0.03LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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