International Klein Blue

#011FB3

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein patented this color in 1957. What makes IKB unique is its remarkable saturation and intensity. Klein used a matte, synthetic resin binder that allowed the pigment to maintain its pure color intensity. This color is not just a color; it's a statement, deeply associated with art history and the avant-garde movement. Its powerful impact stems from its purity and the way it commands attention. In the art world, it represents a certain vision of the infinite and immaterial, qualities that Klein sought to capture in his work. The unique matte finish further enhances the color's vibrancy, making it stand out distinctly from other blue hues.

The hex color #011FB3, also known as International Klein Blue, presents certain accessibility challenges, especially in web design. Due to its deep, intense hue, it offers low contrast when paired with lighter colors like white or yellow, which is a critical factor for readability. According to WCAG (Web Content Accessibility Guidelines), sufficient contrast between text and background is essential for users with visual impairments. Using #011FB3 as a background color for text requires careful consideration of the foreground color; lighter shades might need to be significantly brightened to achieve the recommended contrast ratio. Furthermore, avoid using this color to convey crucial information without additional cues, such as text labels or icons, to ensure inclusivity for color-blind users. Testing color combinations with accessibility tools is highly recommended.

Shades

Digital Color Formats

RGB
1 31 179
RGB1 31 179
Red
Green
Blue
HSL
229.89 98.89% 35.29%
229.8998.8935.29HSL
Hue
Saturation
Lightness
HWB
229.89 0.39% 29.8%
229.890.3929.8HWB
Hue
Whiteness
Blackness
hex#011FB3
rgb1 31 179
hsl229.89 98.89% 35.29%
cmyk99.44% 82.68% 0% 29.8%
hwb229.89 0.39% 29.8%
xyz8.64 4.24 43.01
CMYK
99.44% 82.68% 0% 29.8%
99.4482.68029.8CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.64 4.24 43.01
8.644.2443.01XYZ
X
Y
Z

Alternative colors

Applications

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