International Klein Blue

#0935AB

About International Klein Blue

International Klein Blue (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 the color. The color was synthetically created and patented by Yves Klein in 1956. It is a specific shade of blue achieved by suspending pure ultramarine pigment in a synthetic resin binder. The vibrancy and intensity of IKB arise from the pigment's purity and the unique properties of the resin, which allows the pigment particles to maintain their individual light-reflecting qualities to a greater extent than traditional binders. It is considered a monochromatic color and is very popular within artistic applications.

The hex color #0935ab, also known as International Klein Blue, presents some accessibility challenges, particularly for text. Due to its dark nature, it requires careful consideration of contrast ratios to ensure readability for users with visual impairments. When using this color for text, it's crucial to pair it with a very light color, such as white or a very pale yellow, to meet WCAG (Web Content Accessibility Guidelines) standards for contrast. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. For decorative elements, the color can be used more freely, but keep in mind the overall visual balance of the page. Avoid using #0935ab for critical interactive elements without proper contrast to ensure usability for all users.

Shades

Digital Color Formats

RGB
9 53 171
RGB9 53 171
Red
Green
Blue
HSL
223.7deg 90% 35.29%
223.79035.29HSL
Hue
Saturation
Lightness
HWB
223.7deg 3.53% 32.94%
223.73.5332.94HWB
Hue
Whiteness
Blackness
hex#0935AB
rgb9 53 171
hsl223.7deg 90% 35.29%
cmyk94.74% 69.01% 0% 32.94%
hwb223.7deg 3.53% 32.94%
xyz-d650.09 0.06 0.39
oklch0.3949 0.1925 263.8
oklab0.3949 -0.02 -0.19
CMYK
94.74% 69.01% 0% 32.94%
94.7469.01032.94CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.39
0.090.060.39XYZ
X
Y
Z
OKLCH
0.3949 0.1925 263.8
0.39490.1925263.8LCH
Lightness
Chroma
Hue
OKLAB
0.3949 -0.02 -0.19
0.3949-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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