International Klein Blue

#0513AF

About International Klein Blue

International Klein Blue, often abbreviated as 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 matte, synthetic resin binder, which suspends the color pigment and allows the pigment to maintain its color characteristics. The extraordinary visual impact of IKB comes from its high saturation and purity. It is a specific shade of blue renowned for its intensity. Yves Klein registered this color as a trademark in 1957, although the trademark has since lapsed. Its unique matte finish enhances the sense of depth and purity, setting it apart from other blue shades. The hue is achieved by suspending pure ultramarine pigment in a synthetic resin binder, maintaining the pigment's original brilliance.

The hex color #0513af, known as International Klein Blue, presents significant accessibility challenges, especially in web design. Its extremely low lightness value means that text or interactive elements rendered in this color require careful consideration of contrast ratios. According to WCAG guidelines, sufficient contrast between foreground and background colors is crucial for users with visual impairments to perceive content effectively. When using #0513af for backgrounds, it's imperative to pair it with very light text colors like white or very light grays to ensure readability. Conversely, if used for text, a very light background is essential. Tools such as contrast checkers are highly recommended to verify compliance with accessibility standards, aiming for a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Failure to meet these standards can exclude users with low vision or color blindness, hindering their ability to access and understand the information presented.

Shades

Digital Color Formats

RGB
5 19 175
RGB5 19 175
Red
Green
Blue
HSL
235.06 94.44% 35.29%
235.0694.4435.29HSL
Hue
Saturation
Lightness
HWB
235.06 1.96% 31.37%
235.061.9631.37HWB
Hue
Whiteness
Blackness
hex#0513AF
rgb5 19 175
hsl235.06 94.44% 35.29%
cmyk97.14% 89.14% 0% 31.37%
hwb235.06 1.96% 31.37%
xyz8.03 3.59 40.83
CMYK
97.14% 89.14% 0% 31.37%
97.1489.14031.37CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.03 3.59 40.83
8.033.5940.83XYZ
X
Y
Z

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