International Klein Blue

#0125B3

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 created this color specifically for his paintings and registered it as a trademark. The color is renowned for its intense saturation and matte finish, which contributes to its striking visual impact. The unique depth of IKB comes from its high concentration of ultramarine pigment suspended in a synthetic resin. Klein believed that this color evoked a sense of boundless space and spiritual experience. The color is achieved using pure, dry ultramarine blue pigment (Lapis Lazuli). Today, International Klein Blue remains a significant color in art and design, recognized for its historical and artistic importance.

The hex color #0125B3, also known as International Klein Blue, presents significant accessibility challenges, especially in web design. Its very dark hue results in low contrast against lighter backgrounds, making text and other elements difficult to read for users with visual impairments. According to WCAG guidelines, sufficient contrast is crucial for ensuring content is accessible to all users, including those with low vision or color blindness. To improve accessibility, it is recommended to pair #0125B3 with very light colors, such as white or very pale yellow, to achieve a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Additionally, avoid using this color for interactive elements without clear visual cues, as users may struggle to identify them. Providing alternative color schemes can further enhance accessibility for those with specific color perception deficiencies.

Shades

Digital Color Formats

RGB
1 37 179
RGB1 37 179
Red
Green
Blue
HSL
227.87 98.89% 35.29%
227.8798.8935.29HSL
Hue
Saturation
Lightness
HWB
227.87 0.39% 29.8%
227.870.3929.8HWB
Hue
Whiteness
Blackness
hex#0125B3
rgb1 37 179
hsl227.87 98.89% 35.29%
cmyk99.44% 79.33% 0% 29.8%
hwb227.87 0.39% 29.8%
xyz8.81 4.58 43.07
CMYK
99.44% 79.33% 0% 29.8%
99.4479.33029.8CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.81 4.58 43.07
8.814.5843.07XYZ
X
Y
Z

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