International Klein Blue

#0A27AA

About International Klein Blue

International Klein Blue, also known as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein patented this color to maintain its uniqueness and association with his artistic creations. Chemically, IKB is a matte version of ultramarine. The visual effect of IKB comes from its heavy reliance on ultramarine pigment, combined with a synthetic resin binder that allows the pigment to retain its brilliance and intensity. The color is strongly associated with Klein's Monochromes, a series of paintings where a single color covers the entire canvas. This use of color aimed to evoke a sense of boundlessness and spiritual depth, inviting viewers to contemplate the infinite. The color has since been used to emphasize artistic vision and the evocation of pure feeling.

The color #0A27AA, a deep and saturated blue, presents significant accessibility challenges, particularly concerning color contrast. When used as a foreground color for text, it necessitates a very light background to meet WCAG (Web Content Accessibility Guidelines) standards for readability. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. This color may not be suitable for extensive blocks of text or crucial interface elements due to potential eye strain and readability issues for users with visual impairments. It's important to carefully select background colors and test contrast ratios to ensure the content is accessible to all users. Consider using color contrast analyzers to verify compliance with accessibility standards. Utilizing this color sparingly for decorative elements or in combination with high-contrast alternatives can mitigate accessibility concerns.

Shades

Digital Color Formats

RGB
10 39 170
RGB10 39 170
Red
Green
Blue
HSL
229.13deg 88.89% 35.29%
229.1388.8935.29HSL
Hue
Saturation
Lightness
HWB
229.13deg 3.92% 33.33%
229.133.9233.33HWB
Hue
Whiteness
Blackness
hex#0A27AA
rgb10 39 170
hsl229.13deg 88.89% 35.29%
cmyk94.12% 77.06% 0% 33.33%
hwb229.13deg 3.92% 33.33%
xyz-d650.08 0.04 0.38
oklch0.3713 0.2058 265.14
oklab0.3713 -0.02 -0.21
CMYK
94.12% 77.06% 0% 33.33%
94.1277.06033.33CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.04 0.38
0.080.040.38XYZ
X
Y
Z
OKLCH
0.3713 0.2058 265.14
0.37130.2058265.14LCH
Lightness
Chroma
Hue
OKLAB
0.3713 -0.02 -0.21
0.3713-0.02-0.21LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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