Blue Charcoal

#040917

General Information about #040917

The hex color code #040917, often referred to as Blue Charcoal, is a very dark shade of blue leaning towards black. It is composed of 1.57% red, 3.53% green, and 9.02% blue. In the RGB color space, it has the values (4, 9, 23). This color is frequently used in designs where a sense of depth, mystery, or sophistication is desired. Given its low luminance, #040917 works best as a background color with light-colored text or elements placed on top to provide sufficient contrast. It can also be used as an accent color in small amounts to add visual interest without overpowering the design. Blue Charcoal is often associated with professionalism, calmness, and stability, making it suitable for corporate branding and minimalist aesthetics.

The hex color #040917, also known as Blue Charcoal, presents significant accessibility challenges due to its extremely low luminance. Its contrast ratio against standard white (#FFFFFF) is very poor, making it difficult for users with visual impairments to discern text or important visual elements. For web content, this color should be avoided for primary text or interactive components. If used, it must be paired with a very light color to ensure sufficient contrast, ideally exceeding the WCAG AA minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. Consider using contrast checking tools during design and development. Furthermore, avoid using it as a background color behind lighter text unless the text size and weight are increased to improve readability. Non-text elements, like icons and graphical controls, also require careful consideration to ensure they meet accessibility standards when using this dark shade.

Shades

Digital Color Formats

RGB
4 9 23
RGB4 9 23
Red
Green
Blue
HSL
224.21deg 70.37% 5.29%
224.2170.375.29HSL
Hue
Saturation
Lightness
HWB
224.21deg 1.57% 90.98%
224.211.5790.98HWB
Hue
Whiteness
Blackness
hex#040917
rgb4 9 23
hsl224.21deg 70.37% 5.29%
cmyk82.61% 60.87% 0% 90.98%
hwb224.21deg 1.57% 90.98%
xyz-d650 0 0.01
oklch0.1424 0.0325 263.79
oklab0.1424 0 -0.03
CMYK
82.61% 60.87% 0% 90.98%
82.6160.87090.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0 0 0.01
000.01XYZ
X
Y
Z
OKLCH
0.1424 0.0325 263.79
0.14240.0325263.79LCH
Lightness
Chroma
Hue
OKLAB
0.1424 0 -0.03
0.14240-0.03LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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