International Klein Blue

#0C1FBE

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. He sought to capture the purest expression of blue, associating it with boundlessness and spirituality. Klein patented the color in 1957 to maintain its unique status. The specific formula involves suspending ultramarine pigment in a synthetic resin binder, which preserves the pigment's intensity and creates a matte finish. IKB has transcended the art world, finding its way into fashion, design, and popular culture. Its distinctiveness lies in its ability to evoke both a sense of calm and a feeling of profound depth. It represents artistic innovation and the power of color in emotional expression. The hex code #0C1FBE represents this distinct blue in the digital realm.

The hex color #0c1fbe, also known as International Klein Blue, presents some accessibility challenges, especially when used for text. Its low lightness value of approximately 13% means that text rendered in this color will require a very light foreground color to ensure sufficient contrast for readability. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text according to WCAG guidelines. Therefore, pairing this dark blue with white or very light shades of yellow or green is crucial. When used for background colors, ensure that all interactive elements and text have adequate contrast. Avoid using it for critical information if contrast cannot be sufficiently met, as users with visual impairments may struggle to perceive the content. In user interface design, consider providing alternative high-contrast themes to enhance accessibility for all users. Testing with accessibility tools is recommended.

Shades

Digital Color Formats

RGB
12 31 190
RGB12 31 190
Red
Green
Blue
HSL
233.6deg 88.12% 39.61%
233.688.1239.61HSL
Hue
Saturation
Lightness
HWB
233.6deg 4.71% 25.49%
233.64.7125.49HWB
Hue
Whiteness
Blackness
hex#0C1FBE
rgb12 31 190
hsl233.6deg 88.12% 39.61%
cmyk93.68% 83.68% 0% 25.49%
hwb233.6deg 4.71% 25.49%
xyz-d650.1 0.05 0.49
oklch0.386 0.2349 265.53
oklab0.386 -0.02 -0.23
CMYK
93.68% 83.68% 0% 25.49%
93.6883.68025.49CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.1 0.05 0.49
0.10.050.49XYZ
X
Y
Z
OKLCH
0.386 0.2349 265.53
0.3860.2349265.53LCH
Lightness
Chroma
Hue
OKLAB
0.386 -0.02 -0.23
0.386-0.02-0.23LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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