International Klein Blue

#0B1FBF

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue mixed and trademarked by the French artist Yves Klein. IKB's visual impact comes from its heavy reliance on ultramarine, as well as Klein's matte, synthetic resin binder which suspends the color pigment and allows the pigment to retain its original qualities. Yves Klein specified the manufacture of this color. The color was registered by Klein in 1957 at the French National Institute of Industrial Property, though he never patented it. This color has since become a significant part of Klein's artistic identity, representing concepts of spirituality and the infinite. In modern usage, IKB is recognized as a bold and distinctive color, often associated with creativity, innovation, and depth.

The hex color #0B1FBF, also known as International Klein Blue (IKB), presents some accessibility challenges. Its high level of saturation and relatively low luminance can make it difficult to read text against this background. According to WCAG guidelines, sufficient contrast between text and background is crucial for readability, especially for users with visual impairments. For text on an IKB background, consider using very light colors like white or very pale yellows to ensure adequate contrast. When using IKB as a design element, be mindful of its impact on users with photosensitivity, as highly saturated blues can trigger discomfort or even seizures in susceptible individuals. Providing options for users to adjust color schemes can significantly enhance accessibility.

Shades

Digital Color Formats

RGB
11 31 191
RGB11 31 191
Red
Green
Blue
HSL
233.33deg 89.11% 39.61%
233.3389.1139.61HSL
Hue
Saturation
Lightness
HWB
233.33deg 4.31% 25.1%
233.334.3125.1HWB
Hue
Whiteness
Blackness
hex#0B1FBF
rgb11 31 191
hsl233.33deg 89.11% 39.61%
cmyk94.24% 83.77% 0% 25.1%
hwb233.33deg 4.31% 25.1%
xyz-d650.1 0.05 0.5
oklch0.3871 0.2362 265.4
oklab0.3871 -0.02 -0.24
CMYK
94.24% 83.77% 0% 25.1%
94.2483.77025.1CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.1 0.05 0.5
0.10.050.5XYZ
X
Y
Z
OKLCH
0.3871 0.2362 265.4
0.38710.2362265.4LCH
Lightness
Chroma
Hue
OKLAB
0.3871 -0.02 -0.24
0.3871-0.02-0.24LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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