Blue Charcoal

#040F17

General Information about #040F17

The hexadecimal color code #040F17, also known as Blue Charcoal, represents a very dark shade of cyan-blue. It is composed of 1.57% red, 5.88% green, and 9.02% blue. In the RGB color model, it is equivalent to RGB(4, 15, 23). In the CMYK color model, its composition is 83% cyan, 35% magenta, 0% yellow, and 91% black. This color is often associated with feelings of tranquility, depth, and sophistication. Its presence is subtle yet impactful, often utilized to convey a sense of understated elegance. Due to its low lightness value, #040F17 falls into the category of very dark colors, and it requires careful consideration when used in conjunction with text or other visual elements to ensure sufficient contrast and readability.

The hex color #040F17, also known as Blue Charcoal, presents significant accessibility challenges, particularly regarding color contrast. When used as a background color, text or foreground elements need to be exceptionally light to meet WCAG (Web Content Accessibility Guidelines) standards for contrast ratios. A minimum contrast ratio of 4.5:1 is generally required for normal-sized text and 3:1 for larger text (14pt bold or 18pt regular) to ensure readability for users with visual impairments. Using tools to check contrast ratios is essential to verify compliance. Due to its dark nature, this color may not be suitable for critical information or interactive elements without careful consideration of contrast. Pairing it with very light shades of gray, white, or potentially vibrant, contrasting accent colors is crucial to enhance accessibility. Further considerations should include providing alternative visual cues for users who may not be able to distinguish subtle color differences. Ensuring sufficient contrast isn't just about compliance; it's about inclusive design, making content accessible to everyone, regardless of their visual abilities.

Shades

Digital Color Formats

RGB
4 15 23
RGB4 15 23
Red
Green
Blue
HSL
205.26deg 70.37% 5.29%
205.2670.375.29HSL
Hue
Saturation
Lightness
HWB
205.26deg 1.57% 90.98%
205.261.5790.98HWB
Hue
Whiteness
Blackness
hex#040F17
rgb4 15 23
hsl205.26deg 70.37% 5.29%
cmyk82.61% 34.78% 0% 90.98%
hwb205.26deg 1.57% 90.98%
xyz-d650 0 0.01
oklch0.1615 0.0247 238.7
oklab0.1615 -0.01 -0.02
CMYK
82.61% 34.78% 0% 90.98%
82.6134.78090.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0 0 0.01
000.01XYZ
X
Y
Z
OKLCH
0.1615 0.0247 238.7
0.16150.0247238.7LCH
Lightness
Chroma
Hue
OKLAB
0.1615 -0.01 -0.02
0.1615-0.01-0.02LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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