International Klein Blue

#011EB3

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. 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 its original qualities. Yves Klein registered this brilliant blue hue as a trademark under the name International Klein Blue (IKB) in 1957. The color is renowned for its intensity and depth, which Klein sought to achieve by minimizing the reflective properties of the paint. The unique matte finish enhances the color's vibrancy, making it appear almost luminous. The color is often associated with concepts of immateriality and infinity, reflecting Klein's artistic vision.

The hex color #011eb3, also known as International Klein Blue, presents significant accessibility challenges, particularly for users with visual impairments. Its extremely low lightness value of approximately 4% means that text or other visual elements rendered in this color require very high contrast ratios with the background to be legible. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for standard text and 3:1 for large text against its background. Given the darkness of #011eb3, only very light colors (approaching white) would meet these criteria. Web developers must carefully consider color combinations and provide sufficient contrast. Furthermore, avoid using #011eb3 as the sole means of conveying information, such as in links or interactive elements, without additional cues (e.g., underlines, icons) to ensure inclusivity.

Shades

Digital Color Formats

RGB
1 30 179
RGB1 30 179
Red
Green
Blue
HSL
230.22 98.89% 35.29%
230.2298.8935.29HSL
Hue
Saturation
Lightness
HWB
230.22 0.39% 29.8%
230.220.3929.8HWB
Hue
Whiteness
Blackness
hex#011EB3
rgb1 30 179
hsl230.22 98.89% 35.29%
cmyk99.44% 83.24% 0% 29.8%
hwb230.22 0.39% 29.8%
xyz8.61 4.19 43
CMYK
99.44% 83.24% 0% 29.8%
99.4483.24029.8CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.61 4.19 43
8.614.1943XYZ
X
Y
Z

Alternative colors

Applications

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