Ultramarine

#0B1191

General Information about #0B1191

The hexadecimal color code #0B1191 represents a dark shade of blue, often referred to as ultramarine. In the RGB color model, it is composed of 4.31% red, 6.67% green, and 56.86% blue. This indicates that blue is the dominant color component. In the CMYK color model, commonly used for printing, it consists of 95% cyan, 93% magenta, 0% yellow, and 43% black. This signifies that a large amount of cyan and magenta is needed to create this shade. Ultramarine blue is known for its deep, rich tone and has a long history in art, dating back to when it was derived from the precious stone lapis lazuli. The digital representation allows for consistent and accurate reproduction of this color across various media.

The color #0B1191, a deep ultramarine, presents significant accessibility challenges, primarily due to its low luminance. When used as text, it requires a very light background to meet WCAG (Web Content Accessibility Guidelines) standards for contrast ratio. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text (14pt bold or 18pt regular). This deep blue shade might fail these criteria against many common background colors, potentially causing readability issues for users with visual impairments. Therefore, careful consideration should be given to the background color choice. Using tools to check color contrast is essential. Also avoid using this color for critical interactive elements without sufficient contrast, as it could be missed by users with low vision. Alternatives might involve using a lighter tint of blue or pairing it with high-contrast accent colors to enhance visibility.

Shades

Digital Color Formats

RGB
11 17 145
RGB11 17 145
Red
Green
Blue
HSL
237.31deg 85.9% 30.59%
237.3185.930.59HSL
Hue
Saturation
Lightness
HWB
237.31deg 4.31% 43.14%
237.314.3143.14HWB
Hue
Whiteness
Blackness
hex#0B1191
rgb11 17 145
hsl237.31deg 85.9% 30.59%
cmyk92.41% 88.28% 0% 43.14%
hwb237.31deg 4.31% 43.14%
xyz-d650.05 0.03 0.27
oklch0.3133 0.1944 266.48
oklab0.3133 -0.01 -0.19
CMYK
92.41% 88.28% 0% 43.14%
92.4188.28043.14CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.05 0.03 0.27
0.050.030.27XYZ
X
Y
Z
OKLCH
0.3133 0.1944 266.48
0.31330.1944266.48LCH
Lightness
Chroma
Hue
OKLAB
0.3133 -0.01 -0.19
0.3133-0.01-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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