International Klein Blue

#051EB0

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 collaborated with a Parisian paint supplier, Edouard Adam, to achieve and maintain the color's unique quality. This color is renowned for its intense purity and vibrancy, largely due to its heavy reliance on ultramarine pigment. Klein registered IKB as a trademark in 1957, solidifying its place in art history. The color is most notably used in Klein's monochromatic paintings and sculptures. He believed that this particular blue best conveyed his concept of boundless space and spirituality. It is a colour that seeks to evoke feeling above representation.

The hex color #051EB0, also known as International Klein Blue, presents some accessibility challenges, especially in web design. Its dark hue results in low contrast when paired with lighter text colors, which can make content difficult for users with visual impairments to read. According to WCAG guidelines, sufficient contrast ratios are crucial for ensuring readability. Using #051EB0 as a background color necessitates using a very light text color, such as white or a very pale yellow, to meet the minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. Testing color combinations with accessibility tools is essential to confirm compliance. Moreover, consider providing alternative color schemes that offer higher contrast for users with specific needs. Avoid using this color for critical elements like links or buttons without careful contrast adjustments.

Shades

Digital Color Formats

RGB
5 30 176
RGB5 30 176
Red
Green
Blue
HSL
231.23deg 94.48% 35.49%
231.2394.4835.49HSL
Hue
Saturation
Lightness
HWB
231.23deg 1.96% 30.98%
231.231.9630.98HWB
Hue
Whiteness
Blackness
hex#051EB0
rgb5 30 176
hsl231.23deg 94.48% 35.49%
cmyk97.16% 82.95% 0% 30.98%
hwb231.23deg 1.96% 30.98%
xyz-d650.08 0.04 0.41
oklch0.3659 0.2212 264.82
oklab0.3659 -0.02 -0.22
CMYK
97.16% 82.95% 0% 30.98%
97.1682.95030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.04 0.41
0.080.040.41XYZ
X
Y
Z
OKLCH
0.3659 0.2212 264.82
0.36590.2212264.82LCH
Lightness
Chroma
Hue
OKLAB
0.3659 -0.02 -0.22
0.3659-0.02-0.22LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons