International Klein Blue

#0937AB

About International Klein Blue

International Klein Blue (IKB) is a deep blue hue first mixed by the French artist Yves Klein. IKB's visual impact comes from its heavy reliance on ultramarine, as well as Klein's artistic vision. Klein specified that the color should always be made with a matte, synthetic resin binder to maintain its intensity. This allows the pigment particles to remain suspended and retain their original qualities. IKB has become iconic in the art world and popular culture, often associated with creativity, freedom, and boundless imagination. The color is registered as a trademark under the name International Klein Blue (IKB).

The hex color #0937ab, also known as International Klein Blue, presents some accessibility challenges. Its dark hue results in a low contrast ratio against standard white backgrounds, potentially making text and interface elements difficult to read for users with visual impairments. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. When using #0937ab for text or interactive elements, it's crucial to pair it with a light color to ensure sufficient contrast. White (#ffffff) or very light shades of gray are good choices. Tools like contrast checkers can help verify compliance with accessibility standards and prevent usability issues. Ignoring contrast can exclude users and create poor user experience.

Shades

Digital Color Formats

RGB
9 55 171
RGB9 55 171
Red
Green
Blue
HSL
222.96deg 90% 35.29%
222.969035.29HSL
Hue
Saturation
Lightness
HWB
222.96deg 3.53% 32.94%
222.963.5332.94HWB
Hue
Whiteness
Blackness
hex#0937AB
rgb9 55 171
hsl222.96deg 90% 35.29%
cmyk94.74% 67.84% 0% 32.94%
hwb222.96deg 3.53% 32.94%
xyz-d650.09 0.06 0.39
oklch0.3984 0.1902 263.55
oklab0.3984 -0.02 -0.19
CMYK
94.74% 67.84% 0% 32.94%
94.7467.84032.94CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.39
0.090.060.39XYZ
X
Y
Z
OKLCH
0.3984 0.1902 263.55
0.39840.1902263.55LCH
Lightness
Chroma
Hue
OKLAB
0.3984 -0.02 -0.19
0.3984-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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