International Klein Blue

#012BBC

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 specific shade of blue was developed by Klein in collaboration with a Parisian paint dealer, Edouard Adam, to achieve the greatest visual impact of blueness. IKB's visual effect comes from its reliance on Ultramarine pigment, and particularly from the paint's matte, highly absorbent quality, which gives a feeling of the color's maximum depth. The vividness and uniqueness of IKB led Klein to patent the color in 1957, solidifying its place in art history. This color has since become a symbol of Klein's artistic expression and is often associated with feelings of depth, infinity, and the immaterial.

The hex color #012BBC, also known as International Klein Blue, presents significant accessibility challenges, primarily due to its low luminance. When used as a foreground color against a white background, it fails to meet the WCAG (Web Content Accessibility Guidelines) AA contrast ratio requirements, making it difficult for users with visual impairments to read the text. To improve accessibility, consider using a lighter background color or a significantly lighter shade of blue as the foreground. Implementing sufficient contrast ensures that content is perceivable and usable by a wider audience, including those with low vision or color blindness. Tools like contrast checkers can help determine if the color combination meets accessibility standards. Also, providing alternative text descriptions for images and using ARIA attributes can further enhance the overall accessibility of web content featuring this vibrant hue. Use it sparingly and carefully.

Shades

Digital Color Formats

RGB
1 43 188
RGB1 43 188
Red
Green
Blue
HSL
226.52deg 98.94% 37.06%
226.5298.9437.06HSL
Hue
Saturation
Lightness
HWB
226.52deg 0.39% 26.27%
226.520.3926.27HWB
Hue
Whiteness
Blackness
hex#012BBC
rgb1 43 188
hsl226.52deg 98.94% 37.06%
cmyk99.47% 77.13% 0% 26.27%
hwb226.52deg 0.39% 26.27%
xyz-d650.1 0.05 0.48
oklch0.3964 0.2243 264.01
oklab0.3964 -0.02 -0.22
CMYK
99.47% 77.13% 0% 26.27%
99.4777.13026.27CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.1 0.05 0.48
0.10.050.48XYZ
X
Y
Z
OKLCH
0.3964 0.2243 264.01
0.39640.2243264.01LCH
Lightness
Chroma
Hue
OKLAB
0.3964 -0.02 -0.22
0.3964-0.02-0.22LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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