International Klein Blue

#0329B1

About International Klein Blue

International Klein Blue (IKB), represented by the hex code #0329b1, is a deep and intense shade of blue renowned for its unique saturation and vibrancy. The color was originally developed by the French artist Yves Klein in collaboration with a Parisian paint supplier. Klein sought to capture the purest expression of blue, believing it to be the color most closely associated with the immaterial and the infinite. He patented the color in 1957, ensuring its exclusive use in his artistic creations. IKB is achieved through a specific formulation of ultramarine pigment suspended in a synthetic resin binder, which preserves the pigment's intensity and allows it to maintain its luminosity. It is distinct from other blues due to its unparalleled depth and its ability to evoke a sense of awe and wonder. The color has since been used in other artistic and cultural contexts.

The hex color #0329b1, representing International Klein Blue, presents some accessibility challenges due to its deep, saturated hue and low lightness value. When used as a foreground color, it requires careful consideration of contrast ratios, especially against lighter backgrounds. Text rendered in this color on a white or very light background may not meet WCAG (Web Content Accessibility Guidelines) standards for sufficient contrast, potentially hindering readability for users with visual impairments. A contrast ratio of at least 4.5:1 is recommended for standard text and 3:1 for large text. To improve accessibility, consider pairing #0329b1 with very light colors such as #ffffff (white) or #f0f0f0 (light gray) or use it for decorative elements rather than critical text. Providing alternative high-contrast themes or allowing users to customize color schemes can also enhance the overall accessibility of the design. Additionally, avoid using this color alone to convey important information; supplement it with text labels or icons that provide context for all users.

Shades

Digital Color Formats

RGB
3 41 177
RGB3 41 177
Red
Green
Blue
HSL
226.9deg 96.67% 35.29%
226.996.6735.29HSL
Hue
Saturation
Lightness
HWB
226.9deg 1.18% 30.59%
226.91.1830.59HWB
Hue
Whiteness
Blackness
hex#0329B1
rgb3 41 177
hsl226.9deg 96.67% 35.29%
cmyk98.31% 76.84% 0% 30.59%
hwb226.9deg 1.18% 30.59%
xyz-d650.09 0.05 0.42
oklch0.3811 0.2132 264.21
oklab0.3811 -0.02 -0.21
CMYK
98.31% 76.84% 0% 30.59%
98.3176.84030.59CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.42
0.090.050.42XYZ
X
Y
Z
OKLCH
0.3811 0.2132 264.21
0.38110.2132264.21LCH
Lightness
Chroma
Hue
OKLAB
0.3811 -0.02 -0.21
0.3811-0.02-0.21LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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