International Klein Blue

#0A2DAA

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein worked with a Parisian paint dealer, Edouard Adam, to achieve and maintain the color's unique visual impact. The vividness of IKB comes from its reliance on ultramarine pigment, along with a synthetic resin binder that allows the pigment to maintain its brilliance. This specific combination minimizes the typical dulling effect that binders have on pigments. Klein patented IKB in 1957, although the patent was more of a formal declaration of his rights to the color rather than a strict legal protection. It is used to create a strong impression on the viewer. IKB is a vibrant, matte color that strongly stands out.

The hex color #0a2daa, also known as International Klein Blue, presents certain accessibility challenges in web design. Its dark hue requires careful consideration of color contrast, especially for text elements. According to WCAG guidelines, sufficient contrast between text and background is crucial for readability, particularly for users with visual impairments. When using #0a2daa as a background, pairing it with light text colors like white or very light grays is essential to meet accessibility standards. Conversely, if #0a2daa is used for text, a light background is necessary. Tools that measure color contrast ratios can assist in ensuring compliance. Moreover, relying solely on color to convey information should be avoided. Additional cues, such as text labels or icons, should be included to ensure that all users can perceive and understand the content, regardless of their color vision abilities. Proper implementation enhances the user experience, making the content accessible to a wider audience.

Shades

Digital Color Formats

RGB
10 45 170
RGB10 45 170
Red
Green
Blue
HSL
226.88deg 88.89% 35.29%
226.8888.8935.29HSL
Hue
Saturation
Lightness
HWB
226.88deg 3.92% 33.33%
226.883.9233.33HWB
Hue
Whiteness
Blackness
hex#0A2DAA
rgb10 45 170
hsl226.88deg 88.89% 35.29%
cmyk94.12% 73.53% 0% 33.33%
hwb226.88deg 3.92% 33.33%
xyz-d650.08 0.05 0.39
oklch0.3805 0.1998 264.71
oklab0.3805 -0.02 -0.2
CMYK
94.12% 73.53% 0% 33.33%
94.1273.53033.33CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.05 0.39
0.080.050.39XYZ
X
Y
Z
OKLCH
0.3805 0.1998 264.71
0.38050.1998264.71LCH
Lightness
Chroma
Hue
OKLAB
0.3805 -0.02 -0.2
0.3805-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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