International Klein Blue

#0F1BBB

About International Klein Blue

International Klein Blue, represented by the hexadecimal color code #0f1bbb, is a deep, ultramarine blue hue renowned for its intense vibrancy and visual impact. It was developed by the French artist Yves Klein in collaboration with a Parisian paint dealer, aiming to capture and preserve the color's luminosity. Klein registered the color as a trademark in 1957, cementing its place in art history. This particular shade of blue is achieved through a specific mixture of ultramarine pigment and a synthetic resin binder, which allows the pigment to maintain its brilliance. It is widely used in art, design, and fashion to evoke feelings of depth, spirituality, and limitless space. Its captivating presence makes it a favorite choice for creating visually striking and memorable designs.

The hex color #0f1bbb, a deep, saturated blue, presents significant accessibility challenges, particularly concerning color contrast. When used as a foreground color, it necessitates a very light background to meet WCAG (Web Content Accessibility Guidelines) standards for readability. Text rendered in this color on a dark background will be virtually illegible for most users, and even more challenging for individuals with visual impairments. To ensure accessibility, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Careful consideration should be given to the color pairings when using #0f1bbb in user interfaces or web design. Using tools like contrast checkers is essential to verify compliance with accessibility guidelines. Alternatives, such as lighter shades of blue or pairing it with neutral tones like white or very light grays, can improve readability and inclusivity.

Shades

Digital Color Formats

RGB
15 27 187
RGB15 27 187
Red
Green
Blue
HSL
235.81deg 85.15% 39.61%
235.8185.1539.61HSL
Hue
Saturation
Lightness
HWB
235.81deg 5.88% 26.67%
235.815.8826.67HWB
Hue
Whiteness
Blackness
hex#0F1BBB
rgb15 27 187
hsl235.81deg 85.15% 39.61%
cmyk91.98% 85.56% 0% 26.67%
hwb235.81deg 5.88% 26.67%
xyz-d650.1 0.04 0.47
oklch0.3789 0.2339 266.04
oklab0.3789 -0.02 -0.23
CMYK
91.98% 85.56% 0% 26.67%
91.9885.56026.67CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.1 0.04 0.47
0.10.040.47XYZ
X
Y
Z
OKLCH
0.3789 0.2339 266.04
0.37890.2339266.04LCH
Lightness
Chroma
Hue
OKLAB
0.3789 -0.02 -0.23
0.3789-0.02-0.23LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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