International Klein Blue

#0029AB

About International Klein Blue

International Klein Blue (IKB), represented by the hexadecimal color code #0029ab, is a deep ultramarine blue hue renowned for its intensity and purity. It was developed by the French artist Yves Klein in collaboration with a Parisian paint supplier, and officially patented in 1957. Klein sought to capture the purest expression of blue, believing it conveyed a sense of boundless space and spiritual depth. IKB achieves its unique visual impact through a high concentration of pigment and a synthetic resin binder that suspends the pigment particles, maintaining their brilliance. Due to its captivating aesthetic, IKB has been widely adopted in art, design, and fashion, symbolizing creativity, innovation, and a quest for the sublime.

The hex color #0029ab, also known as International Klein Blue (IKB), presents some accessibility challenges, especially in web design. Due to its deep, saturated nature and relatively low luminance, it can be difficult to read text displayed in this color against a light background, or conversely, light text against an IKB background. To ensure good accessibility, it's essential to use a color contrast checker to verify that the contrast ratio between the text and background meets WCAG (Web Content Accessibility Guidelines) standards. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. When using IKB, consider pairing it with very light or very dark colors to achieve sufficient contrast. Furthermore, provide alternative visual cues or text descriptions for users who may have difficulty perceiving the color due to color blindness or other visual impairments. Thoughtful consideration of color contrast and alternative cues will ensure a more inclusive and accessible experience for all users.

Shades

Digital Color Formats

RGB
0 41 171
RGB0 41 171
Red
Green
Blue
HSL
225.61deg 100% 33.53%
225.6110033.53HSL
Hue
Saturation
Lightness
HWB
225.61deg 0% 32.94%
225.61032.94HWB
Hue
Whiteness
Blackness
hex#0029AB
rgb0 41 171
hsl225.61deg 100% 33.53%
cmyk100% 76.02% 0% 32.94%
hwb225.61deg 0% 32.94%
xyz-d650.08 0.05 0.39
oklch0.3735 0.2065 263.77
oklab0.3735 -0.02 -0.21
CMYK
100% 76.02% 0% 32.94%
10076.02032.94CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.05 0.39
0.080.050.39XYZ
X
Y
Z
OKLCH
0.3735 0.2065 263.77
0.37350.2065263.77LCH
Lightness
Chroma
Hue
OKLAB
0.3735 -0.02 -0.21
0.3735-0.02-0.21LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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