International Klein Blue

#0819AB

About International Klein Blue

International Klein Blue, represented by the hex code #0819ab, is a deep ultramarine blue pigment first synthesized and popularized by the French artist Yves Klein. Klein registered this color as a trademark to preserve its unique identity. The pigment's distinctive quality stems from its intense saturation and lack of reflective highlights, achieving a mesmerizing matte appearance. Chemically, it is a synthetic ultramarine, primarily composed of sodium aluminosilicate with small amounts of sulfur. In the RGB color space, #0819ab comprises 3.14% red, 9.8% green, and 67.06% blue. Its corresponding values in the CMYK space are 95% cyan, 85.4% magenta, 0% yellow, and 33% black. This color is highly esteemed in the art world for its depth, purity, and emotional impact, often associated with concepts of infinity, spirituality, and the sublime.

The hex color #0819ab, also known as International Klein Blue, presents significant accessibility challenges, particularly for users with visual impairments. Its extremely dark hue results in very low contrast against lighter backgrounds, making text or graphical elements difficult to discern. Web Content Accessibility Guidelines (WCAG) emphasize a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text against its background. This color likely fails to meet these guidelines against many common background colors, necessitating careful consideration. To improve accessibility, pairing #0819ab with very light colors like #ffffff or #f0f0f0 is crucial. Furthermore, avoid using it for critical information or interactive elements unless sufficient contrast is ensured. Providing alternative high-contrast themes can also enhance the user experience for individuals with visual sensitivities.

Shades

Digital Color Formats

RGB
8 25 171
RGB8 25 171
Red
Green
Blue
HSL
233.74deg 91.06% 35.1%
233.7491.0635.1HSL
Hue
Saturation
Lightness
HWB
233.74deg 3.14% 32.94%
233.743.1432.94HWB
Hue
Whiteness
Blackness
hex#0819AB
rgb8 25 171
hsl233.74deg 91.06% 35.1%
cmyk95.32% 85.38% 0% 32.94%
hwb233.74deg 3.14% 32.94%
xyz-d650.08 0.04 0.39
oklch0.3547 0.2188 265.34
oklab0.3547 -0.02 -0.22
CMYK
95.32% 85.38% 0% 32.94%
95.3285.38032.94CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.04 0.39
0.080.040.39XYZ
X
Y
Z
OKLCH
0.3547 0.2188 265.34
0.35470.2188265.34LCH
Lightness
Chroma
Hue
OKLAB
0.3547 -0.02 -0.22
0.3547-0.02-0.22LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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