International Klein Blue

#0818A9

About International Klein Blue

International Klein Blue, often referred to as IKB, is a deep blue hue first synthesized by the French artist Yves Klein. Klein patented this specific shade of blue to maintain its unique and powerful visual impact. Chemically, IKB is a matte version of ultramarine, created with a synthetic resin binder that allows the pigment to maintain its intensity and luminosity. This color evokes feelings of depth, spirituality, and boundlessness. In art, IKB has been used to create monochrome paintings, sculptures, and environments, allowing viewers to immerse themselves in the color's pure essence. Its application extends beyond the art world, appearing in fashion, interior design, and even brand identity for companies wanting to convey innovation and sophistication.

The color #0818A9, also known as International Klein Blue, presents several accessibility challenges, primarily due to its low lightness value. Its contrast ratio against white is generally quite low, making it difficult for individuals with visual impairments to read text or distinguish elements rendered in this color against a light background. Web developers should avoid using this color for primary text or interactive elements without careful consideration of contrast. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text to meet WCAG 2.1 AA standards. Using color contrast analyzers is crucial to ensure sufficient contrast. To improve accessibility, developers might pair this dark blue with very light shades of yellow or orange to achieve acceptable contrast ratios. Consider also providing alternative visual cues, such as icons or text labels, to supplement color-based information.

Shades

Digital Color Formats

RGB
8 24 169
RGB8 24 169
Red
Green
Blue
HSL
234.04deg 90.96% 34.71%
234.0490.9634.71HSL
Hue
Saturation
Lightness
HWB
234.04deg 3.14% 33.73%
234.043.1433.73HWB
Hue
Whiteness
Blackness
hex#0818A9
rgb8 24 169
hsl234.04deg 90.96% 34.71%
cmyk95.27% 85.8% 0% 33.73%
hwb234.04deg 3.14% 33.73%
xyz-d650.08 0.04 0.38
oklch0.3511 0.2172 265.38
oklab0.3511 -0.02 -0.22
CMYK
95.27% 85.8% 0% 33.73%
95.2785.8033.73CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.04 0.38
0.080.040.38XYZ
X
Y
Z
OKLCH
0.3511 0.2172 265.38
0.35110.2172265.38LCH
Lightness
Chroma
Hue
OKLAB
0.3511 -0.02 -0.22
0.3511-0.02-0.22LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons