International Klein Blue

#0217A4

About International Klein Blue

International Klein Blue, often referred to as IKB, is a deep blue hue first mixed by the French artist Yves Klein. The color is a specific shade of blue created by Yves Klein in collaboration with a Parisian paint dealer, Edouard Adam, during 1950s. IKB's visual impact comes from its heavy reliance on ultramarine, as well as Klein's matte, synthetic resin binder, which suspends the color pigment and allows the pigment to maintain as much of its original qualities as possible. Yves Klein registered the color as a trademark in 1957, although the trademark has since expired. The unique quality of IKB is its ability to evoke a sense of depth and boundlessness, as it absorbs light rather than reflecting it, making it appear almost infinite. This color is often associated with creativity, spirituality, and the infinite nature of the universe. Its intense saturation makes it an eye-catching and memorable color choice.

The hex color #0217a4, also known as International Klein Blue, presents significant accessibility challenges, particularly in web design. Its very dark hue results in extremely low contrast against standard light backgrounds, making text and interactive elements nearly illegible for users with visual impairments. According to WCAG guidelines, sufficient contrast ratios are crucial for ensuring readability and usability. To meet these standards, it is imperative to pair #0217a4 with extremely light colors such as white (#ffffff) or very pale yellows or greens. Tools like contrast checkers can help determine if the combination meets the required contrast ratios, which are typically 4.5:1 for normal text and 3:1 for large text. It's also important to consider providing alternative color schemes for users who may have specific visual preferences or needs.

Shades

Digital Color Formats

RGB
2 23 164
RGB2 23 164
Red
Green
Blue
HSL
232.22deg 97.59% 32.55%
232.2297.5932.55HSL
Hue
Saturation
Lightness
HWB
232.22deg 0.78% 35.69%
232.220.7835.69HWB
Hue
Whiteness
Blackness
hex#0217A4
rgb2 23 164
hsl232.22deg 97.59% 32.55%
cmyk98.78% 85.98% 0% 35.69%
hwb232.22deg 0.78% 35.69%
xyz-d650.07 0.03 0.35
oklch0.3422 0.2134 264.53
oklab0.3422 -0.02 -0.21
CMYK
98.78% 85.98% 0% 35.69%
98.7885.98035.69CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.07 0.03 0.35
0.070.030.35XYZ
X
Y
Z
OKLCH
0.3422 0.2134 264.53
0.34220.2134264.53LCH
Lightness
Chroma
Hue
OKLAB
0.3422 -0.02 -0.21
0.3422-0.02-0.21LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons