International Klein Blue

#0029C5

About International Klein Blue

International Klein Blue (IKB), also known as #0029C5 in hexadecimal representation, is a deep blue hue first mixed by the French artist Yves Klein. It's renowned for its intensity and high saturation, achieved through the addition of a synthetic resin binder that allows the pigment to maintain its brilliance. Klein registered this color as a trademark to safeguard its unique visual properties. IKB is not just a color; it's a statement, often associated with art, innovation, and the boundless possibilities of the imagination. Its distinctive depth creates a sense of endlessness, and it has been used to evoke feelings of the sublime and transcendent in various artistic and commercial applications.

The hex color #0029c5, also known as International Klein Blue, presents significant accessibility challenges, especially in web design. Its low luminance value of 5.7 makes it difficult to achieve sufficient contrast with lighter colors for text and user interface elements. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is required for normal text and 3:1 for large text. When used as a foreground color, #0029c5 necessitates a very light background to meet these standards. Conversely, as a background, only very bright text colors will suffice. Designers must carefully evaluate color combinations using contrast checkers to ensure readability and usability, particularly for users with visual impairments. Overreliance on such a dark blue can exclude users and diminish overall user experience.

Shades

Digital Color Formats

RGB
0 41 197
RGB0 41 197
Red
Green
Blue
HSL
227.51deg 100% 38.63%
227.5110038.63HSL
Hue
Saturation
Lightness
HWB
227.51deg 0% 22.75%
227.51022.75HWB
Hue
Whiteness
Blackness
hex#0029C5
rgb0 41 197
hsl227.51deg 100% 38.63%
cmyk100% 79.19% 0% 22.75%
hwb227.51deg 0% 22.75%
xyz-d650.11 0.06 0.53
oklch0.4042 0.2365 264.05
oklab0.4042 -0.02 -0.24
CMYK
100% 79.19% 0% 22.75%
10079.19022.75CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.11 0.06 0.53
0.110.060.53XYZ
X
Y
Z
OKLCH
0.4042 0.2365 264.05
0.40420.2365264.05LCH
Lightness
Chroma
Hue
OKLAB
0.4042 -0.02 -0.24
0.4042-0.02-0.24LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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