International Klein Blue

#0A35AA

General Information about International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue that was developed and trademarked by the French artist Yves Klein. Its designation as #0A35AA in the hexadecimal color system identifies it as a specific spectral composition. The color's unique intensity and depth arise from Klein's use of a matte, synthetic resin binder that allows the pigment to retain its vividness when applied. Klein pursued a patent for the color to preserve its artistic integrity. IKB is not merely a color but represents an artistic concept tied to Klein's exploration of the infinite and immaterial. It became integral to his artistic identity and symbolic of his pursuit of pure color. The hex code #0A35AA, as with any color code, specifies the exact mixture of red, green, and blue light required to produce this unique hue on digital displays. The color is perceived as a dark and vibrant shade of blue.

International Klein Blue (#0A35AA) presents some accessibility challenges. Its relatively low luminance (a measure of brightness) means that text rendered in this color may not provide sufficient contrast against a light background. According to WCAG guidelines, sufficient contrast is essential for readability, especially for users with visual impairments. To ensure accessibility, consider using a lighter text color on an IKB background or using IKB as an accent color rather than for large blocks of text. The use of IKB for interactive elements also requires attention. Ensure that interactive elements such as buttons or links have a sufficient contrast ratio when in their default, hover, and focus states. For example, a hover effect that subtly lightens the IKB can further reduce contrast and hinder usability. Colorblind users should be considered during accessibility design. Use color contrast tools to verify that the contrast ratio between the text and background is sufficient, aiming for a ratio of at least 4.5:1 for normal text and 3:1 for large text. A combination of color and other visual cues, such as icons or labels, can help ensure that all users can perceive the intended meaning.

Shades

Digital Color Formats

RGB
10 53 170
RGB10 53 170
Red
Green
Blue
HSL
223.88deg 88.89% 35.29%
223.8888.8935.29HSL
Hue
Saturation
Lightness
HWB
223.88deg 3.92% 33.33%
223.883.9233.33HWB
Hue
Whiteness
Blackness
hex#0A35AA
rgb10 53 170
hsl223.88deg 88.89% 35.29%
cmyk94.12% 68.82% 0% 33.33%
hwb223.88deg 3.92% 33.33%
xyz-d650.09 0.06 0.39
oklch0.394 0.1911 263.88
oklab0.394 -0.02 -0.19
CMYK
94.12% 68.82% 0% 33.33%
94.1268.82033.33CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.39
0.090.060.39XYZ
X
Y
Z
OKLCH
0.394 0.1911 263.88
0.3940.1911263.88LCH
Lightness
Chroma
Hue
OKLAB
0.394 -0.02 -0.19
0.394-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons