International Klein Blue

#0024A7

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. Klein registered this color as a trademark in 1957, although the trademark was subsequently deemed unenforceable. IKB's visual impact comes from its heavy reliance on ultramarine pigment, combined with a synthetic resin binder that suspends the pigment particles and allows them to maintain their brilliance. The color's unique matte finish enhances its saturation, making it appear exceptionally vivid. IKB is often associated with concepts like infinity, spirituality, and the immaterial, reflecting Klein's artistic vision to detach color from form and convey pure emotion.

International Klein Blue (#0024A7) presents accessibility challenges due to its deep saturation and low lightness value. When used as a background color, sufficient contrast with text is crucial for readability. White or very light shades of yellow or green are recommended for text to meet WCAG (Web Content Accessibility Guidelines) standards for contrast ratios. Avoid pairing it with dark colors, as this will significantly reduce readability. In user interface design, use this color sparingly for key interactive elements to ensure they stand out, but always check the contrast ratio with foreground elements. Consider providing alternative color schemes for users with visual impairments. Tools like WebAIM's Contrast Checker can assist in verifying compliance with accessibility standards, ensuring a more inclusive and user-friendly experience.

Shades

Digital Color Formats

RGB
0 36 167
RGB0 36 167
Red
Green
Blue
HSL
227.07deg 100% 32.75%
227.0710032.75HSL
Hue
Saturation
Lightness
HWB
227.07deg 0% 34.51%
227.07034.51HWB
Hue
Whiteness
Blackness
hex#0024A7
rgb0 36 167
hsl227.07deg 100% 32.75%
cmyk100% 78.44% 0% 34.51%
hwb227.07deg 0% 34.51%
xyz-d650.08 0.04 0.37
oklch0.3614 0.2066 263.95
oklab0.3614 -0.02 -0.21
CMYK
100% 78.44% 0% 34.51%
10078.44034.51CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.04 0.37
0.080.040.37XYZ
X
Y
Z
OKLCH
0.3614 0.2066 263.95
0.36140.2066263.95LCH
Lightness
Chroma
Hue
OKLAB
0.3614 -0.02 -0.21
0.3614-0.02-0.21LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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