International Klein Blue

#0037A8

About International Klein Blue

International Klein Blue, represented by the hex code #0037A8, is a deep, intense shade of blue known for its unique vibrancy and matte finish. It was developed by the French artist Yves Klein in collaboration with a Parisian paint dealer, Edouard Adam, to capture and retain the color's luminosity. Klein registered this color as a trademark in 1957. Chemically, IKB is a synthetic ultramarine pigment suspended in a clear resin binder. Its distinct visual impact stems from its high concentration of pigment and the resin's ability to maintain the pigment's original brilliance. IKB is not just a color but a cultural icon, synonymous with innovation, art, and a certain avant-garde sensibility.

The hex color #0037A8, also known as International Klein Blue, presents some accessibility challenges, particularly concerning color contrast. When using this color for text or interactive elements, it is crucial to ensure sufficient contrast against the background. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Given the darkness of #0037A8, lighter colors like white or very pale yellows would be appropriate choices for foreground elements. Tools like WebAIM's contrast checker can be used to verify compliance. Employing techniques such as text shadows or borders can also enhance readability and accessibility. It's important to consider that individuals with visual impairments, such as low vision or color blindness, may have difficulty distinguishing elements with insufficient contrast. Therefore, rigorous testing with accessibility evaluation tools and assistive technologies is recommended to ensure an inclusive user experience.

Shades

Digital Color Formats

RGB
0 55 168
RGB0 55 168
Red
Green
Blue
HSL
220.36deg 100% 32.94%
220.3610032.94HSL
Hue
Saturation
Lightness
HWB
220.36deg 0% 34.12%
220.36034.12HWB
Hue
Whiteness
Blackness
hex#0037A8
rgb0 55 168
hsl220.36deg 100% 32.94%
cmyk100% 67.26% 0% 34.12%
hwb220.36deg 0% 34.12%
xyz-d650.08 0.06 0.38
oklch0.3938 0.1877 262.39
oklab0.3938 -0.02 -0.19
CMYK
100% 67.26% 0% 34.12%
10067.26034.12CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.06 0.38
0.080.060.38XYZ
X
Y
Z
OKLCH
0.3938 0.1877 262.39
0.39380.1877262.39LCH
Lightness
Chroma
Hue
OKLAB
0.3938 -0.02 -0.19
0.3938-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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