International Klein Blue

#0027CA

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 patented this color in 1957. What sets IKB apart is its remarkable intensity and purity. Klein believed that this specific shade of blue best conveyed his artistic concepts, particularly concerning immateriality and transcendence. The color is achieved by using a matte, synthetic resin binder that allows the pigment to retain its vibrancy. IKB has since become an iconic color in the art world, design, and popular culture, frequently associated with sophistication, creativity, and a touch of the avant-garde. Its unique visual impact continues to inspire artists and designers alike.

The hex color #0027ca, also known as International Klein Blue (IKB), presents significant accessibility challenges, particularly concerning color contrast. When used as a foreground color, it necessitates a very light background to meet WCAG (Web Content Accessibility Guidelines) requirements for sufficient contrast ratios. Insufficient contrast can make text and interactive elements difficult or impossible for users with visual impairments to perceive, including those with low vision or color blindness. Therefore, web developers must carefully evaluate the color pairings, utilizing contrast checking tools to ensure compliance. As an alternative, consider using IKB sparingly for decorative purposes or larger elements, and always provide alternative visual cues, such as icons or labels, to convey meaning. Furthermore, interactive elements should always have discernible focus states, independent of color alone. Thoughtful color palette selection and adherence to accessibility guidelines are crucial to creating inclusive web experiences.

Shades

Digital Color Formats

RGB
0 39 202
RGB0 39 202
Red
Green
Blue
HSL
228.42deg 100% 39.61%
228.4210039.61HSL
Hue
Saturation
Lightness
HWB
228.42deg 0% 20.78%
228.42020.78HWB
Hue
Whiteness
Blackness
hex#0027CA
rgb0 39 202
hsl228.42deg 100% 39.61%
cmyk100% 80.69% 0% 20.78%
hwb228.42deg 0% 20.78%
xyz-d650.11 0.06 0.56
oklch0.4078 0.2436 264.13
oklab0.4078 -0.02 -0.24
CMYK
100% 80.69% 0% 20.78%
10080.69020.78CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.11 0.06 0.56
0.110.060.56XYZ
X
Y
Z
OKLCH
0.4078 0.2436 264.13
0.40780.2436264.13LCH
Lightness
Chroma
Hue
OKLAB
0.4078 -0.02 -0.24
0.4078-0.02-0.24LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons