International Klein Blue

#0A20B1

About International Klein Blue

International Klein Blue, represented by the hex code #0a20b1, is a deep, vivid blue color that is known for its intensity and striking appearance. It was originally developed by the French artist Yves Klein in collaboration with a Parisian paint dealer, Édouard Adam, to capture the purest expression of blue. Klein patented this color under the name International Klein Blue (IKB) in 1957. IKB's unique characteristic stems from its matte, ultramarine pigment, which allows the color to retain its vibrancy and depth when applied to surfaces. It is often associated with a sense of depth, transcendence, and the infinite, making it popular in art, design, and fashion.

The hex color #0a20b1, also known as International Klein Blue, presents significant accessibility challenges, particularly concerning color contrast. When used as a foreground color for text or interactive elements, it requires careful consideration of the background color. Due to its dark hue, it demands a very light background to meet WCAG (Web Content Accessibility Guidelines) standards for sufficient contrast ratios. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text to ensure readability for users with visual impairments. Insufficient contrast can make content difficult or impossible to read for many users, including those with low vision or color blindness. Therefore, when using #0a20b1, ensure that the selected background color provides adequate contrast and conduct thorough accessibility testing with various tools and user groups.

Shades

Digital Color Formats

RGB
10 32 177
RGB10 32 177
Red
Green
Blue
HSL
232.1deg 89.3% 36.67%
232.189.336.67HSL
Hue
Saturation
Lightness
HWB
232.1deg 3.92% 30.59%
232.13.9230.59HWB
Hue
Whiteness
Blackness
hex#0A20B1
rgb10 32 177
hsl232.1deg 89.3% 36.67%
cmyk94.35% 81.92% 0% 30.59%
hwb232.1deg 3.92% 30.59%
xyz-d650.09 0.04 0.42
oklch0.3705 0.22 265.4
oklab0.3705 -0.02 -0.22
CMYK
94.35% 81.92% 0% 30.59%
94.3581.92030.59CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.04 0.42
0.090.040.42XYZ
X
Y
Z
OKLCH
0.3705 0.22 265.4
0.37050.22265.4LCH
Lightness
Chroma
Hue
OKLAB
0.3705 -0.02 -0.22
0.3705-0.02-0.22LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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