International Klein Blue

#0028CA

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. This specific shade of blue was developed as part of Klein's exploration of color and its ability to evoke emotional and spiritual responses. He patented IKB in 1957 to maintain its unique character and to ensure that the color would always be associated with his art. It is known for its intense saturation, achieved by using a synthetic resin binder that allows the pigment to maintain its vividness. This blue is intended to represent the cosmos, infinity, and the immaterial. Because of its uniqueness and intensity, the color has a long history of being associated with art and creative expression.

The color #0028CA, also known as International Klein Blue, presents some accessibility challenges, particularly in web design. Its dark hue means that text or other elements rendered in this color require a light-colored background to ensure sufficient contrast for readability. According to WCAG (Web Content Accessibility Guidelines), a contrast ratio of at least 4.5:1 is recommended for standard text and 3:1 for large text. This color would likely fail these contrast tests against many common background colors, necessitating careful selection of complementary colors to meet accessibility standards. Using tools to check color contrast is crucial when implementing this color in digital interfaces. Furthermore, avoid using it as the sole indicator of interactive elements, as users with color vision deficiencies may not be able to distinguish it from other colors.

Shades

Digital Color Formats

RGB
0 40 202
RGB0 40 202
Red
Green
Blue
HSL
228.12deg 100% 39.61%
228.1210039.61HSL
Hue
Saturation
Lightness
HWB
228.12deg 0% 20.78%
228.12020.78HWB
Hue
Whiteness
Blackness
hex#0028CA
rgb0 40 202
hsl228.12deg 100% 39.61%
cmyk100% 80.2% 0% 20.78%
hwb228.12deg 0% 20.78%
xyz-d650.11 0.06 0.56
oklch0.409 0.2428 264.11
oklab0.409 -0.02 -0.24
CMYK
100% 80.2% 0% 20.78%
10080.2020.78CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.11 0.06 0.56
0.110.060.56XYZ
X
Y
Z
OKLCH
0.409 0.2428 264.11
0.4090.2428264.11LCH
Lightness
Chroma
Hue
OKLAB
0.409 -0.02 -0.24
0.409-0.02-0.24LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons