International Klein Blue

#0531AF

About International Klein Blue

International Klein Blue, often referred to as IKB, is a deep shade of blue that was first created by the French artist Yves Klein. Klein wanted to create a blue that was as pure and intense as possible, reminiscent of the color he saw in the sky over Nice. To achieve this, he worked with a chemist to develop a synthetic ultramarine pigment. The unique quality of IKB lies in its matte finish, which enhances its visual impact by minimizing light reflection, giving it a velvety, almost ethereal appearance. The color was officially patented by Klein in 1957, solidifying its place in art history as a color uniquely associated with his artistic vision and exploration of color as a medium for conveying emotion and depth.

The hex color #0531AF, also known as International Klein Blue, presents significant accessibility challenges, particularly for users with visual impairments. Its extremely low luminance contrast against white backgrounds makes text and interactive elements difficult to perceive. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal-sized text and 3:1 for large text to ensure readability. This color fails to meet these criteria when paired with white. Therefore, it is crucial to use this color sparingly and with careful consideration. Implementing techniques such as using a much lighter background or employing color combinations with sufficient contrast is essential. Additionally, providing alternative visual cues, such as icons or text labels, can further improve accessibility for all users. Testing with accessibility tools is strongly advised to validate compliance with accessibility standards and to ensure a positive user experience for individuals with disabilities. Avoid using this color for critical user interface elements without proper contrast adjustments.

Shades

Digital Color Formats

RGB
5 49 175
RGB5 49 175
Red
Green
Blue
HSL
224.47deg 94.44% 35.29%
224.4794.4435.29HSL
Hue
Saturation
Lightness
HWB
224.47deg 1.96% 31.37%
224.471.9631.37HWB
Hue
Whiteness
Blackness
hex#0531AF
rgb5 49 175
hsl224.47deg 94.44% 35.29%
cmyk97.14% 72% 0% 31.37%
hwb224.47deg 1.96% 31.37%
xyz-d650.09 0.05 0.41
oklch0.3916 0.2024 263.87
oklab0.3916 -0.02 -0.2
CMYK
97.14% 72% 0% 31.37%
97.1472031.37CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.41
0.090.050.41XYZ
X
Y
Z
OKLCH
0.3916 0.2024 263.87
0.39160.2024263.87LCH
Lightness
Chroma
Hue
OKLAB
0.3916 -0.02 -0.2
0.3916-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons