International Klein Blue

#0735AD

About International Klein Blue

International Klein Blue, represented by the hexadecimal color code #0735ad, is a deep, intense ultramarine blue pigment first synthesized and made famous by the French artist Yves Klein. Klein registered this color as a trademark to protect its unique identity, solidifying its place in art history. The color's captivating depth arises from its high concentration of pure pigment suspended in a synthetic resin, creating a matte finish that enhances its visual impact. Its distinctive appearance is due to its spectral reflectance curve, which exhibits a peak in the blue region and minimal reflection in other areas of the spectrum. It is named after Yves Klein for a reason, since he created the color and used it in most of his art. It is used throughout the world, and is known as the color that Yves Klein created.

The hex color #0735ad, also known as International Klein Blue, presents accessibility challenges due to its low luminance. When used as a background color, it requires very light text (ideally white or near-white) to ensure sufficient contrast for readability, meeting WCAG (Web Content Accessibility Guidelines) standards for color contrast. A contrast ratio of at least 4.5:1 for normal text and 3:1 for large text is recommended. Tools like WebAIM's Contrast Checker can verify compliance. Avoid pairing this dark blue with other dark colors, as it will render text and elements illegible. Furthermore, consider users with visual impairments, offering alternative high-contrast themes. Ensure that information isn't conveyed solely through color; use supplementary cues such as text labels or icons. Semantic HTML and ARIA attributes can enhance accessibility for screen reader users.

Shades

Digital Color Formats

RGB
7 53 173
RGB7 53 173
Red
Green
Blue
HSL
223.37deg 92.22% 35.29%
223.3792.2235.29HSL
Hue
Saturation
Lightness
HWB
223.37deg 2.75% 32.16%
223.372.7532.16HWB
Hue
Whiteness
Blackness
hex#0735AD
rgb7 53 173
hsl223.37deg 92.22% 35.29%
cmyk95.95% 69.36% 0% 32.16%
hwb223.37deg 2.75% 32.16%
xyz-d650.09 0.06 0.4
oklch0.3966 0.1953 263.64
oklab0.3966 -0.02 -0.19
CMYK
95.95% 69.36% 0% 32.16%
95.9569.36032.16CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.4
0.090.060.4XYZ
X
Y
Z
OKLCH
0.3966 0.1953 263.64
0.39660.1953263.64LCH
Lightness
Chroma
Hue
OKLAB
0.3966 -0.02 -0.19
0.3966-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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