International Klein Blue

#0531AE

About International Klein Blue

International Klein Blue, often referred to as IKB, is a deep blue hue first mixed by the French artist Yves Klein. This specific shade was developed as part of Klein's exploration of color as a medium for conveying pure ideas and emotions. The color is achieved by mixing ultramarine pigment with a synthetic resin binder, which maintains the pigment's intensity and brilliance. Klein famously registered IKB as a trademark to protect its unique identity and ensure that it remained associated with his artistic vision. Since its creation, IKB has been adopted in various fields, including art, fashion, and design, prized for its striking visual impact and symbolic depth. Its recognition is mostly because of the artist Yves Klein.

The hex color #0531ae, also known as International Klein Blue, presents some accessibility challenges in web design due to its low luminance. When used as a foreground color, it requires careful consideration of the background color to ensure sufficient contrast for readability. According to WCAG guidelines, the contrast ratio between text and background should be at least 4.5:1 for normal text and 3:1 for large text. When paired with white (#ffffff), #0531ae falls short of these recommendations, necessitating the use of a lighter tint of blue or a different, lighter color altogether for text. For decorative elements or non-textual content, a contrast ratio of 3:1 is sufficient. Therefore, designers should test color combinations using contrast checkers to ensure compliance with accessibility standards, making the web content accessible to individuals with visual impairments. Proper use of ARIA attributes can further enhance accessibility.

Shades

Digital Color Formats

RGB
5 49 174
RGB5 49 174
Red
Green
Blue
HSL
224.38deg 94.41% 35.1%
224.3894.4135.1HSL
Hue
Saturation
Lightness
HWB
224.38deg 1.96% 31.76%
224.381.9631.76HWB
Hue
Whiteness
Blackness
hex#0531AE
rgb5 49 174
hsl224.38deg 94.41% 35.1%
cmyk97.13% 71.84% 0% 31.76%
hwb224.38deg 1.96% 31.76%
xyz-d650.09 0.05 0.41
oklch0.3905 0.2012 263.85
oklab0.3905 -0.02 -0.2
CMYK
97.13% 71.84% 0% 31.76%
97.1371.84031.76CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.41
0.090.050.41XYZ
X
Y
Z
OKLCH
0.3905 0.2012 263.85
0.39050.2012263.85LCH
Lightness
Chroma
Hue
OKLAB
0.3905 -0.02 -0.2
0.3905-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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