International Klein Blue

#0933AB

About International Klein Blue

International Klein Blue, often referred to as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein registered this color as a trademark in 1957. What sets IKB apart is its remarkable intensity and purity, achieved through a unique matte finish. The color is visually striking and has a distinct ultramarine appearance. Klein used this color extensively in his monochrome paintings and sculptures, aiming to evoke a sense of boundlessness and spiritual depth. The color is created using a synthetic ultramarine pigment, and its matte finish is achieved by suspending the pigment in a clear synthetic resin, maintaining its vibrant and pure quality. The impact of International Klein Blue extends beyond the art world, influencing design, fashion, and popular culture. IKB represents a significant intersection of art, science, and branding.

The hex color #0933ab, also known as International Klein Blue, presents some accessibility challenges. Its relatively low lightness value (approximately 9%) means that it requires careful consideration when used as a background or text color. According to WCAG (Web Content Accessibility Guidelines) standards, sufficient contrast between foreground and background colors is crucial for readability and usability, especially for users with visual impairments. For text, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. When using #0933ab, it's essential to pair it with a very light color like white (#ffffff) or a light yellow to ensure adequate contrast. Tools like contrast checkers can help evaluate the contrast ratio and ensure compliance with accessibility standards. Avoid using this color for critical interactive elements unless accompanied by a very high contrast indicator.

Shades

Digital Color Formats

RGB
9 51 171
RGB9 51 171
Red
Green
Blue
HSL
224.44deg 90% 35.29%
224.449035.29HSL
Hue
Saturation
Lightness
HWB
224.44deg 3.53% 32.94%
224.443.5332.94HWB
Hue
Whiteness
Blackness
hex#0933AB
rgb9 51 171
hsl224.44deg 90% 35.29%
cmyk94.74% 70.18% 0% 32.94%
hwb224.44deg 3.53% 32.94%
xyz-d650.09 0.05 0.39
oklch0.3914 0.1947 264.03
oklab0.3914 -0.02 -0.19
CMYK
94.74% 70.18% 0% 32.94%
94.7470.18032.94CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.39
0.090.050.39XYZ
X
Y
Z
OKLCH
0.3914 0.1947 264.03
0.39140.1947264.03LCH
Lightness
Chroma
Hue
OKLAB
0.3914 -0.02 -0.19
0.3914-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons