International Klein Blue

#0B39A8

About International Klein Blue

International Klein Blue, represented by the hex code #0B39A8, is a deep and intense shade of blue renowned for its unique vibrancy. It was developed by the French artist Yves Klein in collaboration with a Parisian paint dealer. Klein sought to create a blue that captured the essence of the sky and the sea, aiming for an ultramarine that possessed exceptional purity and depth. The color is achieved through a specific formula that involves suspending ultramarine pigment in a synthetic resin, which allows the pigment to retain its brilliance and luminosity. International Klein Blue is not just a color; it is an artistic statement that has influenced various fields, including art, fashion, and design. Its captivating hue makes it a favorite for those seeking to evoke a sense of depth, mystery, and sophistication.

The color #0B39A8, also known as International Klein Blue, presents some accessibility challenges due to its deep, saturated hue. When used as a background, it requires very light text to ensure sufficient contrast for readability. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text, according to WCAG guidelines. This color may not be suitable for users with visual impairments or color blindness, especially if used for critical information or interactive elements. To improve accessibility, consider pairing it with contrasting colors like white, yellow, or light gray. Avoid using it for small text or icons, and always test the color combination with accessibility evaluation tools to ensure compliance with accessibility standards. Use of this color should be carefully considered in user interface design to prevent eye strain and ensure inclusivity for all users.

Shades

Digital Color Formats

RGB
11 57 168
RGB11 57 168
Red
Green
Blue
HSL
222.42deg 87.71% 35.1%
222.4287.7135.1HSL
Hue
Saturation
Lightness
HWB
222.42deg 4.31% 34.12%
222.424.3134.12HWB
Hue
Whiteness
Blackness
hex#0B39A8
rgb11 57 168
hsl222.42deg 87.71% 35.1%
cmyk93.45% 66.07% 0% 34.12%
hwb222.42deg 4.31% 34.12%
xyz-d650.09 0.06 0.38
oklch0.3994 0.1838 263.36
oklab0.3994 -0.02 -0.18
CMYK
93.45% 66.07% 0% 34.12%
93.4566.07034.12CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.38
0.090.060.38XYZ
X
Y
Z
OKLCH
0.3994 0.1838 263.36
0.39940.1838263.36LCH
Lightness
Chroma
Hue
OKLAB
0.3994 -0.02 -0.18
0.3994-0.02-0.18LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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