International Klein Blue

#001B9D

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue that was developed by the French artist Yves Klein. This specific shade of blue was synthetically created and patented by Klein to visually represent his concept of the infinite and immaterial. The color is renowned for its intense saturation and unique matte finish, which enhances its visual impact. IKB became a signature element in Klein's artistic works, particularly in his monochrome paintings and sculptures. The color is so distinctive that it is now recognized as a symbol of Klein's artistic vision and a significant contribution to the world of modern art.

International Klein Blue, represented by the hex code #001B9D, presents some accessibility challenges, particularly when used for text. Its low luminance value means that it requires careful consideration of contrast ratios. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is required for normal text and 3:1 for large text against its background. When using #001B9D for text, it is crucial to pair it with a very light color, such as white or a very pale yellow, to ensure sufficient contrast. Using it as a background color also warrants careful selection of foreground elements. Designers should utilize contrast checking tools to verify compliance with accessibility standards and ensure readability for users with visual impairments. This color can be used for decorative elements where the contrast is not important.

Shades

Digital Color Formats

RGB
0 27 157
RGB0 27 157
Red
Green
Blue
HSL
229.68deg 100% 30.78%
229.6810030.78HSL
Hue
Saturation
Lightness
HWB
229.68deg 0% 38.43%
229.68038.43HWB
Hue
Whiteness
Blackness
hex#001B9D
rgb0 27 157
hsl229.68deg 100% 30.78%
cmyk100% 82.8% 0% 38.43%
hwb229.68deg 0% 38.43%
xyz-d650.06 0.03 0.32
oklch0.3371 0.2029 264.15
oklab0.3371 -0.02 -0.2
CMYK
100% 82.8% 0% 38.43%
10082.8038.43CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.06 0.03 0.32
0.060.030.32XYZ
X
Y
Z
OKLCH
0.3371 0.2029 264.15
0.33710.2029264.15LCH
Lightness
Chroma
Hue
OKLAB
0.3371 -0.02 -0.2
0.3371-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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