International Klein Blue

#0725B7

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 registered this color as a trademark in 1957. The color's visual impact comes from its heavy reliance on ultramarine pigment, as well as Klein's strategy of using a matte, synthetic resin binder that suspends the pigment and allows the color to achieve its maximum saturation. The binder enables the pigment to retain its brilliance, offering a unique visual experience. The color is intended to evoke feelings of boundlessness and immersion. Because of its characteristics, IKB is often found in modern art, fashion and webdesign.

The hex color #0725B7, also known as International Klein Blue (IKB), presents significant accessibility challenges, particularly for users with visual impairments. Its extremely low lightness value of approximately 4% means that text rendered in this color against a white background would have a very poor contrast ratio, far below the WCAG recommended minimum of 4.5:1 for normal text and 3:1 for large text. This violates accessibility guidelines, making it difficult for many users to read the content. To improve accessibility, it is imperative to use a very light color for the text on an IKB background or to use IKB as a background color for very light text. Careful consideration is necessary to ensure compliance with accessibility standards and a positive user experience.

Shades

Digital Color Formats

RGB
7 37 183
RGB7 37 183
Red
Green
Blue
HSL
229.77deg 92.63% 37.25%
229.7792.6337.25HSL
Hue
Saturation
Lightness
HWB
229.77deg 2.75% 28.24%
229.772.7528.24HWB
Hue
Whiteness
Blackness
hex#0725B7
rgb7 37 183
hsl229.77deg 92.63% 37.25%
cmyk96.17% 79.78% 0% 28.24%
hwb229.77deg 2.75% 28.24%
xyz-d650.09 0.05 0.45
oklch0.3835 0.2231 264.86
oklab0.3835 -0.02 -0.22
CMYK
96.17% 79.78% 0% 28.24%
96.1779.78028.24CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.45
0.090.050.45XYZ
X
Y
Z
OKLCH
0.3835 0.2231 264.86
0.38350.2231264.86LCH
Lightness
Chroma
Hue
OKLAB
0.3835 -0.02 -0.22
0.3835-0.02-0.22LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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