International Klein Blue

#012DB3

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. What sets it apart is its remarkable intensity and purity of color. Klein registered this color as a trademark to preserve its unique identity. The pigment itself is a matte, ultramarine blue, which, when suspended in a synthetic resin, retains its vibrancy. This specific combination contributes to the color's powerful visual impact. IKB has since been utilized in various art forms, design applications, and even scientific studies, becoming a symbol of artistic innovation and a unique color standard. It's known for its ability to evoke feelings of depth, serenity, and sophistication.

The hex color #012db3, a deep and vibrant blue known as International Klein Blue, presents significant accessibility challenges. Its low luminance value of 11 results in very poor contrast against a standard white background. According to WCAG guidelines, the contrast ratio is insufficient for both normal text and large text, meaning users with visual impairments, including those with low vision or color blindness, may struggle to read content displayed in this color. To improve accessibility, it is crucial to pair this color with very light shades, such as white or very pale yellows. Alternatively, using #012db3 for decorative elements rather than crucial text can mitigate accessibility concerns. Consider providing alternative color schemes that offer better contrast ratios to ensure a more inclusive user experience.

Shades

Digital Color Formats

RGB
1 45 179
RGB1 45 179
Red
Green
Blue
HSL
225.17deg 98.89% 35.29%
225.1798.8935.29HSL
Hue
Saturation
Lightness
HWB
225.17deg 0.39% 29.8%
225.170.3929.8HWB
Hue
Whiteness
Blackness
hex#012DB3
rgb1 45 179
hsl225.17deg 98.89% 35.29%
cmyk99.44% 74.86% 0% 29.8%
hwb225.17deg 0.39% 29.8%
xyz-d650.09 0.05 0.43
oklch0.389 0.2119 263.79
oklab0.389 -0.02 -0.21
CMYK
99.44% 74.86% 0% 29.8%
99.4474.86029.8CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.43
0.090.050.43XYZ
X
Y
Z
OKLCH
0.389 0.2119 263.79
0.3890.2119263.79LCH
Lightness
Chroma
Hue
OKLAB
0.389 -0.02 -0.21
0.389-0.02-0.21LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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