International Klein Blue

#0737AD

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 patented this color in 1957. What sets IKB apart is its remarkable intensity and purity. The color is achieved through a specific formula involving a synthetic ultramarine pigment suspended in a resin binder. This combination results in a matte finish that maximizes the color's impact, as it minimizes light reflection. IKB has become synonymous with Klein's artistic vision, representing boundless space, spirituality, and the infinite. It is recognized and celebrated across various fields, from art and design to fashion and branding, embodying innovation and originality.

The hex color #0737ad, also known as International Klein Blue, presents significant accessibility challenges, particularly in text-based applications. Its very dark hue results in low contrast against common light backgrounds, such as white or light gray. According to WCAG guidelines, sufficient contrast is essential for readability and usability, especially for individuals with visual impairments. To ensure accessibility, it is crucial to pair this color with very light text or interface elements. The contrast ratio should be at least 4.5:1 for normal text and 3:1 for large text. Thoroughly testing the color combination with accessibility evaluation tools and diverse user groups is highly recommended to validate its compliance with accessibility standards. When used for interactive elements like buttons or links, ensure the color provides clear visual cues for hover, focus, and active states to enhance user experience.

Shades

Digital Color Formats

RGB
7 55 173
RGB7 55 173
Red
Green
Blue
HSL
222.65deg 92.22% 35.29%
222.6592.2235.29HSL
Hue
Saturation
Lightness
HWB
222.65deg 2.75% 32.16%
222.652.7532.16HWB
Hue
Whiteness
Blackness
hex#0737AD
rgb7 55 173
hsl222.65deg 92.22% 35.29%
cmyk95.95% 68.21% 0% 32.16%
hwb222.65deg 2.75% 32.16%
xyz-d650.09 0.06 0.4
oklch0.4002 0.193 263.4
oklab0.4002 -0.02 -0.19
CMYK
95.95% 68.21% 0% 32.16%
95.9568.21032.16CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.4
0.090.060.4XYZ
X
Y
Z
OKLCH
0.4002 0.193 263.4
0.40020.193263.4LCH
Lightness
Chroma
Hue
OKLAB
0.4002 -0.02 -0.19
0.4002-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons