International Klein Blue

#0327B1

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 synthetically created and then patented by Klein in 1957 as a part of his search to find the most pure and impressive expression of blue. The visual impact of IKB comes from its heavy reliance on ultramarine pigment, and its particular visual effect. The color is often associated with a sense of depth, infinity, and the immaterial. In the RGB color model, its approximate values are R:0, G:39, B:177, with a hex code of #0327B1. It is a highly saturated color that stands out due to its uniqueness and bold appearance. The color has since been widely used in art, fashion, and design.

The hex color #0327B1, also known as International Klein Blue, presents significant accessibility challenges, particularly in web design. Its very low luminance value of approximately 2 means that it offers insufficient contrast against commonly used background colors like white or light grays. According to WCAG (Web Content Accessibility Guidelines) standards, text and interactive elements must have a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text against their background to be considered accessible for users with visual impairments. Using #0327B1 for text on a white background would fail this requirement, making it difficult for many users to read the content. To improve accessibility, consider pairing it with much lighter colors or using it sparingly for purely decorative elements where text isn't involved. Ensure sufficient contrast by using tools to test color combinations.

Shades

Digital Color Formats

RGB
3 39 177
RGB3 39 177
Red
Green
Blue
HSL
227.59 96.67% 35.29%
227.5996.6735.29HSL
Hue
Saturation
Lightness
HWB
227.59 1.18% 30.59%
227.591.1830.59HWB
Hue
Whiteness
Blackness
hex#0327B1
rgb3 39 177
hsl227.59 96.67% 35.29%
cmyk98.31% 77.97% 0% 30.59%
hwb227.59 1.18% 30.59%
xyz8.7 4.64 42.03
CMYK
98.31% 77.97% 0% 30.59%
98.3177.97030.59CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.7 4.64 42.03
8.74.6442.03XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

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