International Klein Blue

#0521A8

About International Klein Blue

International Klein Blue, also known as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein sought to create a blue that had the greatest impact on the eye, maximizing the feeling of pure blue, and capturing the essence of the sky and sea. He collaborated with a Parisian paint supplier to suspend pure ultramarine pigment in a synthetic resin, which maintained the color's intensity without dulling the pigment. IKB is more than just a color; it's an artistic statement. Klein used this color extensively in his monochrome paintings and sculptures. The color was officially patented as International Klein Blue (IKB 191) in 1957. It is renowned for its intense, almost velvety appearance, and has become a significant part of art history. Its unique chromatic impact has inspired designers and artists across various fields.

The hex color #0521a8, also known as International Klein Blue, presents significant accessibility challenges, particularly in web design. Its dark and highly saturated nature results in low contrast when paired with lighter colors, especially whites and yellows. This can cause readability issues for users with visual impairments, such as those with low vision or color blindness. According to WCAG guidelines, sufficient contrast ratios are essential for text and interactive elements to ensure usability. To mitigate these issues, designers should avoid using #0521a8 as a background color for light text or as a text color on light backgrounds. Pairing it with much lighter shades of yellow, orange, or green can improve accessibility. Testing color combinations using accessibility checkers is crucial to ensure compliance with accessibility standards and to provide an inclusive user experience for all individuals.

Shades

Digital Color Formats

RGB
5 33 168
RGB5 33 168
Red
Green
Blue
HSL
229.69deg 94.22% 33.92%
229.6994.2233.92HSL
Hue
Saturation
Lightness
HWB
229.69deg 1.96% 34.12%
229.691.9634.12HWB
Hue
Whiteness
Blackness
hex#0521A8
rgb5 33 168
hsl229.69deg 94.22% 33.92%
cmyk97.02% 80.36% 0% 34.12%
hwb229.69deg 1.96% 34.12%
xyz-d650.08 0.04 0.37
oklch0.3596 0.2096 264.76
oklab0.3596 -0.02 -0.21
CMYK
97.02% 80.36% 0% 34.12%
97.0280.36034.12CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.04 0.37
0.080.040.37XYZ
X
Y
Z
OKLCH
0.3596 0.2096 264.76
0.35960.2096264.76LCH
Lightness
Chroma
Hue
OKLAB
0.3596 -0.02 -0.21
0.3596-0.02-0.21LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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