Blue Charcoal

#030D17

General Information about #030D17

The hexadecimal color code #030D17 represents a very dark shade of blue, often referred to as Blue Charcoal. It is composed of 1.18% red, 5.1% green, and 9.02% blue. In the RGB color model, this translates to 3 red, 13 green, and 23 blue. The corresponding CMYK color code is C:87, M:43, Y:0, K:91. This color is predominantly used in designs where a dark, muted tone is desired, providing a sense of sophistication and depth. Due to its low luminance, it's crucial to pair it with lighter colors to ensure readability and visual contrast.

The color #030D17, also known as Blue Charcoal, presents significant accessibility challenges, especially in text-based applications. Its extremely low luminance results in very poor contrast against white or light backgrounds, making it difficult for users with visual impairments to read or distinguish 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. This color is far below those thresholds when paired with lighter colors. Therefore, it's imperative to use #030D17 sparingly and only with appropriately contrasting colors, such as very light yellows or oranges, to ensure readability and usability. Consider using accessibility evaluation tools to verify contrast ratios and make informed design decisions.

Shades

Digital Color Formats

RGB
3 13 23
RGB3 13 23
Red
Green
Blue
HSL
210deg 76.92% 5.1%
21076.925.1HSL
Hue
Saturation
Lightness
HWB
210deg 1.18% 90.98%
2101.1890.98HWB
Hue
Whiteness
Blackness
hex#030D17
rgb3 13 23
hsl210deg 76.92% 5.1%
cmyk86.96% 43.48% 0% 90.98%
hwb210deg 1.18% 90.98%
xyz-d650 0 0.01
oklch0.1539 0.0279 245.28
oklab0.1539 -0.01 -0.03
CMYK
86.96% 43.48% 0% 90.98%
86.9643.48090.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0 0 0.01
000.01XYZ
X
Y
Z
OKLCH
0.1539 0.0279 245.28
0.15390.0279245.28LCH
Lightness
Chroma
Hue
OKLAB
0.1539 -0.01 -0.03
0.1539-0.01-0.03LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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