Blue Charcoal

#01091F

General Information

The hex color #01091F, also referred to as Blue Charcoal, is a very dark shade of blue, close to black. It is composed of 0.4% red, 3.5% green, and 12.2% blue. In the RGB color space, it is represented as rgb(1, 9, 31). In the CMYK color space, its values are cyan: 96.8%, magenta: 71%, yellow: 0%, black: 87.8%. Blue Charcoal evokes feelings of calmness, sophistication, and mystery. Due to its darkness, it is often associated with night, shadows, and depth. Colors such as Blue Charcoal can often be found in modern web design, where it is often used as background colors for dark themes.

The hex color #01091F, also known as Blue Charcoal, presents significant accessibility challenges due to its very dark nature. Its low luminance results in poor contrast against typical light-colored backgrounds, making text and interactive elements difficult to read for users, especially those with visual impairments. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Blue Charcoal falls far short of these recommendations when paired with standard white or light gray backgrounds. Therefore, it is crucial to use this color sparingly and always pair it with very light colors (such as whites, creams, or very pale yellows) to ensure readability. Developers should also consider providing alternative color schemes that offer better contrast for users with different visual needs. Proper testing with accessibility tools is essential to validate the color choices and prevent excluding users with disabilities.

Shades

Digital Color Formats

RGB
1 9 31
RGB1 9 31
Red
Green
Blue
HSL
224deg 93.75% 6.27%
22493.756.27HSL
Hue
Saturation
Lightness
HWB
224deg 0.39% 87.84%
2240.3987.84HWB
Hue
Whiteness
Blackness
hex#01091F
rgb1 9 31
hsl224deg 93.75% 6.27%
cmyk96.77% 70.97% 0% 87.84%
hwb224deg 0.39% 87.84%
xyz-d650 0 0.01
oklch0.1462 0.0506 259.86
oklab0.1462 -0.01 -0.05
CMYK
96.77% 70.97% 0% 87.84%
96.7770.97087.84CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0 0 0.01
000.01XYZ
X
Y
Z
OKLCH
0.1462 0.0506 259.86
0.14620.0506259.86LCH
Lightness
Chroma
Hue
OKLAB
0.1462 -0.01 -0.05
0.1462-0.01-0.05LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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