International Klein Blue

#0236B2

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. What sets IKB apart is its remarkable saturation, achieved by using a matte synthetic resin binder that suspends the pigment and allows it to retain its pure color intensity. This intense ultramarine is visually striking and has been used in various artistic and design applications. The unique depth and vibrancy of IKB make it instantly recognizable and have contributed to its iconic status in the art world.

The color #0236B2, or International Klein Blue (IKB), presents significant accessibility challenges, particularly in web design. Its very dark hue results in low contrast against lighter backgrounds, which can make text and other elements difficult to read for users with visual impairments. Adhering to WCAG (Web Content Accessibility Guidelines) is crucial. For text, a contrast ratio of at least 4.5:1 against the background is recommended for normal text and 3:1 for large text. Given the darkness of IKB, using it for text requires a very light foreground color to meet these ratios. If IKB is used as a background, light-colored text and interactive elements are necessary to ensure readability and usability. Designers should also consider providing alternative color schemes to accommodate users with different visual needs or preferences, as well as testing designs with assistive technologies.

Shades

Digital Color Formats

RGB
2 54 178
RGB2 54 178
Red
Green
Blue
HSL
222.27deg 97.78% 35.29%
222.2797.7835.29HSL
Hue
Saturation
Lightness
HWB
222.27deg 0.78% 30.2%
222.270.7830.2HWB
Hue
Whiteness
Blackness
hex#0236B2
rgb2 54 178
hsl222.27deg 97.78% 35.29%
cmyk98.88% 69.66% 0% 30.2%
hwb222.27deg 0.78% 30.2%
xyz-d650.09 0.06 0.43
oklch0.4028 0.201 263.15
oklab0.4028 -0.02 -0.2
CMYK
98.88% 69.66% 0% 30.2%
98.8869.66030.2CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.43
0.090.060.43XYZ
X
Y
Z
OKLCH
0.4028 0.201 263.15
0.40280.201263.15LCH
Lightness
Chroma
Hue
OKLAB
0.4028 -0.02 -0.2
0.4028-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons