International Klein Blue

#0829AC

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. This vibrant ultramarine pigment was synthetically created and patented by Klein in 1957. The color's striking visual impact comes from its high saturation and near absence of reflectance. It became Klein's signature, used extensively in his monochrome paintings and sculptures. The color is intended to evoke a sense of the infinite and the immaterial. In the CIELAB color space, IKB has approximate values of L* 40, a* 16, and b* -57, placing it firmly in the blue region. Its unique composition makes it stand out from other blues.

The hex color #0829ac, also known as International Klein Blue, presents significant accessibility challenges, especially in web design. Due to its deep, saturated nature and low luminance, using it as a background color requires careful consideration. Foreground text needs to be a light color, such as white or a very pale yellow, to ensure sufficient contrast. According to WCAG guidelines, the contrast ratio should be at least 4.5:1 for normal text and 3:1 for large text. It is crucial to test the color combination with accessibility tools to meet these standards. If adequate contrast cannot be achieved, it's advisable to use a lighter tint of the blue or choose an entirely different color palette to accommodate users with visual impairments.

Shades

Digital Color Formats

RGB
8 41 172
RGB8 41 172
Red
Green
Blue
HSL
227.93deg 91.11% 35.29%
227.9391.1135.29HSL
Hue
Saturation
Lightness
HWB
227.93deg 3.14% 32.55%
227.933.1432.55HWB
Hue
Whiteness
Blackness
hex#0829AC
rgb8 41 172
hsl227.93deg 91.11% 35.29%
cmyk95.35% 76.16% 0% 32.55%
hwb227.93deg 3.14% 32.55%
xyz-d650.08 0.05 0.39
oklch0.3762 0.2065 264.78
oklab0.3762 -0.02 -0.21
CMYK
95.35% 76.16% 0% 32.55%
95.3576.16032.55CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.05 0.39
0.080.050.39XYZ
X
Y
Z
OKLCH
0.3762 0.2065 264.78
0.37620.2065264.78LCH
Lightness
Chroma
Hue
OKLAB
0.3762 -0.02 -0.21
0.3762-0.02-0.21LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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