International Klein Blue

#0127B3

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 artistic use of this particular pigment. The synthesis of IKB was accomplished in 1956 by the chemist Edouard Adam, while Klein patented IKB in 1957. The color’s patent ensures that it must be showcased with the same visual impression and characteristics as Klein intended. The color is highly saturated and has a unique matte finish achieved by suspending the pigment in a synthetic resin. Klein employed IKB in his sculptures and paintings, solidifying its status as a distinctive and influential color in the art world.

The hex color #0127B3, also known as International Klein Blue, presents some accessibility challenges, particularly when used as a background or text color. Its low luminance value means that careful consideration must be given to contrast ratios. According to WCAG guidelines, sufficient contrast between text and background is essential for readability, especially for users with visual impairments. When using #0127B3, it is crucial to pair it with a light color for text or interface elements to ensure a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Using online contrast checkers can help verify compliance. Failure to provide adequate contrast can render content inaccessible to a significant portion of users. Therefore, thoughtful design choices are needed to make this vibrant color accessible.

Shades

Digital Color Formats

RGB
1 39 179
RGB1 39 179
Red
Green
Blue
HSL
227.19 98.89% 35.29%
227.1998.8935.29HSL
Hue
Saturation
Lightness
HWB
227.19 0.39% 29.8%
227.190.3929.8HWB
Hue
Whiteness
Blackness
hex#0127B3
rgb1 39 179
hsl227.19 98.89% 35.29%
cmyk99.44% 78.21% 0% 29.8%
hwb227.19 0.39% 29.8%
xyz8.87 4.71 43.09
CMYK
99.44% 78.21% 0% 29.8%
99.4478.21029.8CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.87 4.71 43.09
8.874.7143.09XYZ
X
Y
Z

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