International Klein Blue

#0A21AA

General Information about International Klein Blue

International Klein Blue, represented by the hex code #0a21aa, is a deep, vibrant shade of blue known for its intensity and luminosity. It was created by the French artist Yves Klein, who sought to capture the purest and most expressive form of blue. Klein registered this particular shade as a trademarked color, emphasizing its unique artistic significance. The color is achieved through a specific formula that involves suspending ultramarine pigment in a synthetic resin, which preserves its brilliance and depth. International Klein Blue has since become a symbol of modern art and creativity, frequently used in various artistic and design contexts. Its unique depth means it is often seen as calming and authoritative.

The hex color #0a21aa, also known as International Klein Blue, presents considerable accessibility challenges, especially for users with visual impairments. Its dark hue results in low contrast when used against light backgrounds like white or light gray. This can make text or interface elements difficult to read, leading to a poor user experience. To improve accessibility, it is crucial to pair #0a21aa with very light colors, ensuring a contrast ratio that meets WCAG (Web Content Accessibility Guidelines) standards, ideally a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Alternatives include using lighter tints of blue or employing a completely different color palette that offers better contrast. Careful consideration of color combinations is essential to ensure that websites and applications are usable by everyone, including individuals with visual disabilities.

Shades

Digital Color Formats

RGB
10 33 170
RGB10 33 170
Red
Green
Blue
HSL
231.38 88.89% 35.29%
231.3888.8935.29HSL
Hue
Saturation
Lightness
HWB
231.38 3.92% 33.33%
231.383.9233.33HWB
Hue
Whiteness
Blackness
hex#0A21AA
rgb10 33 170
hsl231.38 88.89% 35.29%
cmyk94.12% 80.59% 0% 33.33%
hwb231.38 3.92% 33.33%
xyz7.92 4.05 38.4
CMYK
94.12% 80.59% 0% 33.33%
94.1280.59033.33CMYK
Cyan
Magenta
Yellow
Key
XYZ
7.92 4.05 38.4
7.924.0538.4XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

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