International Klein Blue

#0028BF

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. Its unique characteristic is its intense purity and vividness. Klein registered this color as a trademark in 1957, although the trademark was never enforced. Chemically, IKB is a synthetic ultramarine pigment. The color's visual impact stems from its ability to evoke a sense of depth and boundlessness, making it a favorite in modern and contemporary art. IKB is created by suspending pure color pigment in a clear synthetic resin, which allows the pigment to maintain its brilliance. This particular shade of blue is often associated with concepts of spirituality and the infinite, reflecting Klein's own artistic philosophies. The color has since been adopted in various design fields, including fashion, interior design, and graphic design, often symbolizing innovation and creativity.

The hex color #0028bf, also known as International Klein Blue, presents accessibility challenges due to its deep hue. When used as a background color, it requires careful consideration of the foreground text color to ensure sufficient contrast. According to WCAG guidelines, the contrast ratio between the text and background should be at least 4.5:1 for normal text and 3:1 for large text to meet AA compliance. Using white or light yellow text on an International Klein Blue background can provide adequate contrast. However, it's essential to test the color combination with accessibility tools to confirm compliance, especially for users with visual impairments. Overreliance on this intense blue can also be fatiguing for some users, so consider using it sparingly or in combination with lighter, more neutral colors to improve the overall user experience. Meaningful visual information should never rely on color alone, and alternative cues should be provided, such as labels or patterns.

Shades

Digital Color Formats

RGB
0 40 191
RGB0 40 191
Red
Green
Blue
HSL
227.43deg 100% 37.45%
227.4310037.45HSL
Hue
Saturation
Lightness
HWB
227.43deg 0% 25.1%
227.43025.1HWB
Hue
Whiteness
Blackness
hex#0028BF
rgb0 40 191
hsl227.43deg 100% 37.45%
cmyk100% 79.06% 0% 25.1%
hwb227.43deg 0% 25.1%
xyz-d650.1 0.05 0.5
oklch0.3957 0.2306 264.04
oklab0.3957 -0.02 -0.23
CMYK
100% 79.06% 0% 25.1%
10079.06025.1CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.1 0.05 0.5
0.10.050.5XYZ
X
Y
Z
OKLCH
0.3957 0.2306 264.04
0.39570.2306264.04LCH
Lightness
Chroma
Hue
OKLAB
0.3957 -0.02 -0.23
0.3957-0.02-0.23LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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