International Klein Blue

#0921AB

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein patented this color in 1957. What sets IKB apart is its remarkable intensity and vibrancy, achieved by a specific formula involving a synthetic resin binder that suspends the color pigment, allowing it to maintain its saturation and brilliance. This unique formulation gives the color its distinctive matte appearance. The color is intended to evoke feelings of pure space and boundlessness. Its popularity extends beyond the art world, finding use in design, fashion, and various other creative fields due to its striking visual impact.

International Klein Blue (#0921AB) presents accessibility challenges due to its dark hue. When used as a background color, it requires light-colored text (white or light grey) to ensure sufficient contrast for readability. According to WCAG guidelines, the contrast ratio between the text and background should be at least 4.5:1 for normal text and 3:1 for large text to meet AA compliance. For AAA compliance, the ratios should be 7:1 and 4.5:1, respectively. Using tools like contrast checkers is crucial to verify compliance. Avoid pairing this color with other dark shades, as it can strain the eyes and reduce readability, particularly for users with visual impairments. Ensure interactive elements such as buttons and links have clear visual cues and sufficient contrast when using International Klein Blue. Proper use of ARIA attributes can also improve accessibility for screen reader users.

Shades

Digital Color Formats

RGB
9 33 171
RGB9 33 171
Red
Green
Blue
HSL
231.11 90% 35.29%
231.119035.29HSL
Hue
Saturation
Lightness
HWB
231.11 3.53% 32.94%
231.113.5332.94HWB
Hue
Whiteness
Blackness
hex#0921AB
rgb9 33 171
hsl231.11 90% 35.29%
cmyk94.74% 80.7% 0% 32.94%
hwb231.11 3.53% 32.94%
xyz8.01 4.09 38.89
CMYK
94.74% 80.7% 0% 32.94%
94.7480.7032.94CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.01 4.09 38.89
8.014.0938.89XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

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