International Klein Blue

#0337B1

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein sought to create a blue that captured the essence of the sky and the sea. The color was officially patented as International Klein Blue in 1957. IKB's unique quality lies in its vibrant and intense appearance, which is achieved through a specific formula that includes a synthetic ultramarine pigment. The color's high saturation and matte finish contribute to its distinctive visual impact. It is frequently used in art, design, and fashion to create eye-catching and memorable effects.

The hex color #0337b1, also known as International Klein Blue, presents significant accessibility challenges, especially in web design. Its dark hue results in very low contrast when paired with lighter text, making it difficult for users with visual impairments to read content effectively. According to WCAG guidelines, sufficient contrast is crucial for readability. To improve accessibility, consider using lighter shades of text such as white (#FFFFFF) or very light grays. Avoid using similar dark colors for foreground text, as this will exacerbate readability issues. Employing contrast checking tools can help ensure compliance with accessibility standards, providing a more inclusive experience for all users. Also, interactive elements using this color should provide additional visual cues beyond color alone to support users with color blindness.

Shades

Digital Color Formats

RGB
3 55 177
RGB3 55 177
Red
Green
Blue
HSL
222.07deg 96.67% 35.29%
222.0796.6735.29HSL
Hue
Saturation
Lightness
HWB
222.07deg 1.18% 30.59%
222.071.1830.59HWB
Hue
Whiteness
Blackness
hex#0337B1
rgb3 55 177
hsl222.07deg 96.67% 35.29%
cmyk98.31% 68.93% 0% 30.59%
hwb222.07deg 1.18% 30.59%
xyz-d650.09 0.06 0.42
oklch0.4036 0.1986 263.11
oklab0.4036 -0.02 -0.2
CMYK
98.31% 68.93% 0% 30.59%
98.3168.93030.59CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.42
0.090.060.42XYZ
X
Y
Z
OKLCH
0.4036 0.1986 263.11
0.40360.1986263.11LCH
Lightness
Chroma
Hue
OKLAB
0.4036 -0.02 -0.2
0.4036-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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