International Klein Blue

#0A39AA

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. Klein patented this color to maintain its unique identity, ensuring it remained closely associated with his artistic vision. Chemically, it is a vibrant ultramarine pigment known for its intense and pure appearance. In the RGB color model, IKB's composition is approximately 4, 23, 170, resulting in a striking and captivating visual impact. Its distinctiveness has made it a notable color in both art and design, representing creativity, depth, and a touch of the avant-garde. The color has a hex code of #0A39AA.

The hex color #0A39AA, also known as International Klein Blue, presents some accessibility challenges, especially in web design. Its dark hue necessitates careful consideration of color contrast. When used as a background, it demands very light text to ensure readability. A contrast ratio of at least 4.5:1 is recommended for standard text and 3:1 for large text to meet WCAG (Web Content Accessibility Guidelines) standards. This color might not be suitable for critical interactive elements unless accompanied by sufficient visual cues and proper ARIA attributes. For users with low vision, providing options to adjust color schemes becomes crucial. Designers should test color combinations using accessibility evaluation tools to identify and rectify potential usability issues, ensuring inclusivity for all users.

Shades

Digital Color Formats

RGB
10 57 170
RGB10 57 170
Red
Green
Blue
HSL
222.38deg 88.89% 35.29%
222.3888.8935.29HSL
Hue
Saturation
Lightness
HWB
222.38deg 3.92% 33.33%
222.383.9233.33HWB
Hue
Whiteness
Blackness
hex#0A39AA
rgb10 57 170
hsl222.38deg 88.89% 35.29%
cmyk94.12% 66.47% 0% 33.33%
hwb222.38deg 3.92% 33.33%
xyz-d650.09 0.06 0.39
oklch0.4013 0.1865 263.34
oklab0.4013 -0.02 -0.19
CMYK
94.12% 66.47% 0% 33.33%
94.1266.47033.33CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.39
0.090.060.39XYZ
X
Y
Z
OKLCH
0.4013 0.1865 263.34
0.40130.1865263.34LCH
Lightness
Chroma
Hue
OKLAB
0.4013 -0.02 -0.19
0.4013-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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