International Klein Blue

#0B38A8

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 registered this color as a trademark in 1957, although the trademark's validity has been debated. IKB's visual impact comes from its heavy reliance on ultramarine pigment and its matte finish. The color is achieved by suspending pure ultramarine pigment in a synthetic resin, allowing the pigment to maintain its intensity and brightness. This results in a deeply saturated blue that appears to almost glow. Klein used this color extensively in his monochrome paintings and sculptures, aiming to evoke feelings of spirituality and transcendence.

The hex color #0B38A8, also known as International Klein Blue, presents some accessibility challenges, particularly concerning color contrast. When used as a background color, it is crucial to select a foreground text color that provides sufficient contrast to ensure readability for users with visual impairments. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. White or very light shades of yellow or green could be considered as foreground colors to achieve the necessary contrast. Tools such as online contrast checkers can be used to evaluate the color combination. It's also important to consider users with color vision deficiencies, and providing alternative visual cues or textual descriptions can further enhance accessibility.

Shades

Digital Color Formats

RGB
11 56 168
RGB11 56 168
Red
Green
Blue
HSL
222.8deg 87.71% 35.1%
222.887.7135.1HSL
Hue
Saturation
Lightness
HWB
222.8deg 4.31% 34.12%
222.84.3134.12HWB
Hue
Whiteness
Blackness
hex#0B38A8
rgb11 56 168
hsl222.8deg 87.71% 35.1%
cmyk93.45% 66.67% 0% 34.12%
hwb222.8deg 4.31% 34.12%
xyz-d650.09 0.06 0.38
oklch0.3976 0.185 263.51
oklab0.3976 -0.02 -0.18
CMYK
93.45% 66.67% 0% 34.12%
93.4566.67034.12CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.38
0.090.060.38XYZ
X
Y
Z
OKLCH
0.3976 0.185 263.51
0.39760.185263.51LCH
Lightness
Chroma
Hue
OKLAB
0.3976 -0.02 -0.18
0.3976-0.02-0.18LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

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