International Klein Blue

#0134B3

About International Klein Blue

International Klein Blue, often referred to as IKB, is a deep blue hue first synthesized and trademarked by the French artist Yves Klein. Its striking intensity and unique matte finish quickly established it as a signature color in his artwork. The color is achieved through a specific formulation involving a synthetic ultramarine pigment suspended in a resin binder, which preserves the pigment's brilliance. Klein's use of this color was intended to evoke a sense of boundless space and spiritual depth. Today, IKB continues to be admired and used in various creative fields, reflecting its enduring impact on art and design. The color is considered a strong and reliable hue in the blue color space.

The color #0134B3, also known as International Klein Blue, presents accessibility challenges. Its very low lightness value means that text rendered in this color requires a very light foreground color to achieve sufficient contrast. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Using a foreground color like white (#FFFFFF) is crucial. Also consider providing sufficient visual cues beyond color alone to convey information. For users with color vision deficiencies, differentiating this particular shade of blue from similar dark blues can be problematic, so supplemental indicators are necessary. Thoroughly test color combinations using accessibility evaluation tools to ensure compliance with accessibility standards and provide an inclusive experience.

Shades

Digital Color Formats

RGB
1 52 179
RGB1 52 179
Red
Green
Blue
HSL
222.81deg 98.89% 35.29%
222.8198.8935.29HSL
Hue
Saturation
Lightness
HWB
222.81deg 0.39% 29.8%
222.810.3929.8HWB
Hue
Whiteness
Blackness
hex#0134B3
rgb1 52 179
hsl222.81deg 98.89% 35.29%
cmyk99.44% 70.95% 0% 29.8%
hwb222.81deg 0.39% 29.8%
xyz-d650.09 0.06 0.43
oklch0.4002 0.2046 263.27
oklab0.4002 -0.02 -0.2
CMYK
99.44% 70.95% 0% 29.8%
99.4470.95029.8CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.43
0.090.060.43XYZ
X
Y
Z
OKLCH
0.4002 0.2046 263.27
0.40020.2046263.27LCH
Lightness
Chroma
Hue
OKLAB
0.4002 -0.02 -0.2
0.4002-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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