Blue Charcoal

#040F1B

General Information about #040F1B

The hex color code #040F1B, often referred to as Blue Charcoal, represents a very dark shade of blue. It is composed of 1.57% red, 5.88% green, and 10.59% blue. In the RGB color model, it is defined as RGB(4, 15, 27). This color is predominantly used to convey feelings of sophistication, depth, and understated elegance. Due to its low luminance value, it appears almost black, making it suitable for backgrounds or elements where subtlety is desired. When used in design, it's essential to ensure adequate contrast with lighter colors to maintain readability and visual appeal. The color is often found in modern and minimalist designs.

The hex color #040F1B, also known as Blue Charcoal, presents significant accessibility challenges due to its extremely low luminance. With such a dark shade, providing sufficient contrast against lighter text or interface elements becomes crucial. A contrast ratio of at least 4.5:1 is recommended for normal-sized text and 3:1 for large text to meet WCAG AA standards. Failure to meet these contrast requirements can make content difficult or impossible for users with visual impairments to read. Therefore, when using #040F1B, ensure that any foreground elements, especially text, are bright enough to provide adequate contrast. Consider using contrast checking tools to verify compliance with accessibility guidelines. Also avoid using this color for essential graphical elements without proper contrast.

Shades

Digital Color Formats

RGB
4 15 27
RGB4 15 27
Red
Green
Blue
HSL
211.3deg 74.19% 6.08%
211.374.196.08HSL
Hue
Saturation
Lightness
HWB
211.3deg 1.57% 89.41%
211.31.5789.41HWB
Hue
Whiteness
Blackness
hex#040F1B
rgb4 15 27
hsl211.3deg 74.19% 6.08%
cmyk85.19% 44.44% 0% 89.41%
hwb211.3deg 1.57% 89.41%
xyz-d650 0 0.01
oklch0.1643 0.0312 249.22
oklab0.1643 -0.01 -0.03
CMYK
85.19% 44.44% 0% 89.41%
85.1944.44089.41CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0 0 0.01
000.01XYZ
X
Y
Z
OKLCH
0.1643 0.0312 249.22
0.16430.0312249.22LCH
Lightness
Chroma
Hue
OKLAB
0.1643 -0.01 -0.03
0.1643-0.01-0.03LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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