International Klein Blue

#0B38A9

About International Klein Blue

International Klein Blue, also known as IKB, is a deep blue hue first mixed by the French artist Yves Klein. It is characterized by its rich, intense, and almost ultramarine appearance. Klein registered this color as a trademark in France, solidifying its place in art history. The color is achieved through a specific formula involving a synthetic resin binder that allows the pigment to retain its intensity and vibrancy. IKB has been used extensively in Klein's monochrome paintings and sculptures, becoming synonymous with his artistic exploration of color and form. Its unique properties have made it a sought-after color in various design fields.

The hex color #0b38a9, also known as International Klein Blue, presents accessibility challenges due to its deep, saturated nature. When used as a background color, it requires careful selection of foreground text to ensure sufficient contrast. A light or white text color is generally recommended to meet WCAG (Web Content Accessibility Guidelines) standards for color contrast ratios (minimum 4.5:1 for normal text and 3:1 for large text). Avoid pairing this color with dark or similarly saturated colors as text, as this will create readability issues for users, especially those with visual impairments. Thoughtful consideration of color combinations is crucial to ensure an inclusive and accessible user experience. Testing with accessibility tools is highly recommended.

Shades

Digital Color Formats

RGB
11 56 169
RGB11 56 169
Red
Green
Blue
HSL
222.91deg 87.78% 35.29%
222.9187.7835.29HSL
Hue
Saturation
Lightness
HWB
222.91deg 4.31% 33.73%
222.914.3133.73HWB
Hue
Whiteness
Blackness
hex#0B38A9
rgb11 56 169
hsl222.91deg 87.78% 35.29%
cmyk93.49% 66.86% 0% 33.73%
hwb222.91deg 4.31% 33.73%
xyz-d650.09 0.06 0.38
oklch0.3986 0.1863 263.56
oklab0.3986 -0.02 -0.19
CMYK
93.49% 66.86% 0% 33.73%
93.4966.86033.73CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.38
0.090.060.38XYZ
X
Y
Z
OKLCH
0.3986 0.1863 263.56
0.39860.1863263.56LCH
Lightness
Chroma
Hue
OKLAB
0.3986 -0.02 -0.19
0.3986-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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