Blue Charcoal

#031017

General Information about #031017

The hexadecimal color code #031017 represents a very dark shade of blue-gray, often referred to as Blue Charcoal. It's composed of 1.18% red, 6.27% green, and 9.02% blue. In the RGB color space, it has values of R:3, G:16, and B:23. In the CMYK color space, its values are C:0.87, M:0.30, Y:0.00, and K:0.91. The color has a very low luminance, making it appear almost black. Its primary function is to provide a dark backdrop, lending a sense of depth and sophistication. Blue Charcoal is often used in designs where a subtle, understated tone is desired, steering clear of the starkness of pure black while still offering a strong, grounding presence.

The hex color #031017, also known as Blue Charcoal, presents significant accessibility challenges. Its extremely low luminance value (very dark) results in poor contrast against most background colors, especially white. According to WCAG guidelines, sufficient contrast is crucial for readability and usability, particularly for users with visual impairments. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Using #031017 for text on a white background, or even lighter shades, would fall far short of these recommendations, making it difficult for many users to perceive the content. Therefore, using #031017 as a primary text color should be avoided. If it's used as a background color, ensure that any text or interactive elements on top have sufficient contrast, potentially requiring very light or bright colors to meet accessibility standards. Tools like contrast checkers can help evaluate the contrast ratio and suggest alternative color combinations that are more accessible.

Shades

Digital Color Formats

RGB
3 16 23
RGB3 16 23
Red
Green
Blue
HSL
201 76.92% 5.1%
20176.925.1HSL
Hue
Saturation
Lightness
HWB
201 1.18% 90.98%
2011.1890.98HWB
Hue
Whiteness
Blackness
hex#031017
rgb3 16 23
hsl201 76.92% 5.1%
cmyk86.96% 30.43% 0% 90.98%
hwb201 1.18% 90.98%
xyz-d650 0 0.01
oklch0.1638 0.0255 230.75
oklab0.1638 -0.02 -0.02
CMYK
86.96% 30.43% 0% 90.98%
86.9630.43090.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0 0 0.01
000.01XYZ
X
Y
Z
OKLCH
0.1638 0.0255 230.75
0.16380.0255230.75LCH
Lightness
Chroma
Hue
OKLAB
0.1638 -0.02 -0.02
0.1638-0.02-0.02LAB
Lightness
Green–Red
Blue–Yellow

Alternative colors

Applications

Complementary color

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