International Klein Blue

#0F1CBB

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. This particular shade of blue was developed as part of Klein's artistic exploration of pure color. The visual impact of IKB comes from its heavy reliance on ultramarine pigment and its matte finish. Klein registered IKB as a trademark in 1957, even though it was not officially recognized as a color name. IKB is often seen as more intense than standard ultramarine because the matte finish allows for the pigment to stand out. It is often found in fashion, interiour and art related projects. The color is known for its pureness and depth and evokes feelings of infinity and the boundless expanse of the sky.

The color #0F1CBB, also known as International Klein Blue, presents significant accessibility challenges, especially in web design. Its dark hue results in low contrast against lighter backgrounds, potentially making text or interactive elements difficult to read for users with visual impairments. According to WCAG guidelines, sufficient contrast is crucial for readability. To ensure accessibility, it's essential to pair this color with very light backgrounds, ideally white or near-white shades. Furthermore, consider using larger font sizes or bold text to improve legibility. When using this color for interactive elements like buttons, ensure that the hover, focus, and active states also maintain sufficient contrast. Providing alternative color schemes or a user-adjustable contrast option can greatly enhance the user experience for individuals with diverse visual needs, ultimately promoting inclusivity and usability.

Shades

Digital Color Formats

RGB
15 28 187
RGB15 28 187
Red
Green
Blue
HSL
235.47deg 85.15% 39.61%
235.4785.1539.61HSL
Hue
Saturation
Lightness
HWB
235.47deg 5.88% 26.67%
235.475.8826.67HWB
Hue
Whiteness
Blackness
hex#0F1CBB
rgb15 28 187
hsl235.47deg 85.15% 39.61%
cmyk91.98% 85.03% 0% 26.67%
hwb235.47deg 5.88% 26.67%
xyz-d650.1 0.05 0.47
oklch0.3798 0.2332 266.03
oklab0.3798 -0.02 -0.23
CMYK
91.98% 85.03% 0% 26.67%
91.9885.03026.67CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.1 0.05 0.47
0.10.050.47XYZ
X
Y
Z
OKLCH
0.3798 0.2332 266.03
0.37980.2332266.03LCH
Lightness
Chroma
Hue
OKLAB
0.3798 -0.02 -0.23
0.3798-0.02-0.23LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons