International Klein Blue

#0128B3

About International Klein Blue

International Klein Blue, often referred to as IKB, is a deep blue hue first mixed by the French artist Yves Klein. It's renowned for its intense saturation and unique matte finish, which Klein registered as a trademark in 1957. The color is achieved through a specific pigment suspension that retains its vividness and creates a striking visual impact. In terms of color theory, IKB sits within the blue color family, often associated with feelings of depth, stability, and inspiration. It is a tertiary color, meaning it is created by mixing a primary color (blue) with a secondary color (in this case, a hint of violet). Its hexadecimal code is #0128B3. Due to its intensity and saturation, it's often used to evoke strong emotions and make a bold statement.

The hex color #0128b3, also known as International Klein Blue, presents significant accessibility challenges due to its low lightness value. When used as a foreground color, it requires a very light background to provide sufficient contrast for readability, especially for users with visual impairments. According to WCAG guidelines, the contrast ratio between text and background should be at least 4.5:1 for normal text and 3:1 for large text. Using #0128b3 on a dark background would fail these criteria. To improve accessibility, consider using lighter shades of blue or pairing it with a very pale background. Testing with accessibility tools is crucial to ensure compliance and optimal user experience. It is also recommended to avoid using this color alone to convey important information; supplement it with text or icons to ensure inclusivity.

Shades

Digital Color Formats

RGB
1 40 179
RGB1 40 179
Red
Green
Blue
HSL
226.85 98.89% 35.29%
226.8598.8935.29HSL
Hue
Saturation
Lightness
HWB
226.85 0.39% 29.8%
226.850.3929.8HWB
Hue
Whiteness
Blackness
hex#0128B3
rgb1 40 179
hsl226.85 98.89% 35.29%
cmyk99.44% 77.65% 0% 29.8%
hwb226.85 0.39% 29.8%
xyz8.91 4.78 43.1
CMYK
99.44% 77.65% 0% 29.8%
99.4477.65029.8CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.91 4.78 43.1
8.914.7843.1XYZ
X
Y
Z

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