International Klein Blue

#0427B0

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 registered this color as a trademark in 1957. The visual impact of IKB comes from its reliance on ultramarine pigments and the unique matte, synthetic resin binder in which the pigment is suspended. The matte finish allows for maximum pigment saturation, creating a color that appears almost impossibly vibrant and intense. IKB is more than just a color; it represents Klein's artistic exploration of the infinite and the intangible. He believed the color transcended mere visual experience and served as a pathway to a deeper understanding of the universe.

The hex color #0427b0, a deep shade of blue known as International Klein Blue, presents several accessibility considerations for web developers. Due to its dark nature, it is crucial to ensure sufficient contrast when using it for text or interactive elements. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text against its background. Using a light color like white or a very pale yellow can help achieve this contrast. If proper contrast is not maintained, users with visual impairments may struggle to read the content or interact with the interface. Additionally, consider providing alternative visual cues, such as icons or underlines, to complement color-based information. Testing with accessibility tools is highly recommended to ensure compliance and a positive user experience for everyone. The color's intense nature may also be problematic for users with photosensitivity, so moderate use is advised.

Shades

Digital Color Formats

RGB
4 39 176
RGB4 39 176
Red
Green
Blue
HSL
227.79 95.56% 35.29%
227.7995.5635.29HSL
Hue
Saturation
Lightness
HWB
227.79 1.57% 30.98%
227.791.5730.98HWB
Hue
Whiteness
Blackness
hex#0427B0
rgb4 39 176
hsl227.79 95.56% 35.29%
cmyk97.73% 77.84% 0% 30.98%
hwb227.79 1.57% 30.98%
xyz8.61 4.61 41.51
CMYK
97.73% 77.84% 0% 30.98%
97.7377.84030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.61 4.61 41.51
8.614.6141.51XYZ
X
Y
Z

Alternative colors

Applications

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