International Klein Blue

#052FAE

About International Klein Blue

International Klein Blue (IKB), represented by the hexadecimal color code #052FAE, is a deep blue hue developed by the French artist Yves Klein. Klein patented IKB to maintain its unique visual impact, ensuring that other artists and designers could not exactly replicate the color without permission. The color's intensity and depth are achieved by suspending pure color pigment in a clear synthetic resin, which allows the pigment to retain its brilliance without being dulled by a binding agent. IKB is not just a color; it's a symbol of Klein's artistic philosophy, representing the boundless and immaterial nature of the universe. It's often associated with concepts of spirituality, depth, and transcendence. Because of its unique history and visual properties, IKB remains a powerful and iconic color in the art and design world.

The color #052FAE, also known as International Klein Blue (IKB), presents significant accessibility challenges. Its extremely low luminance value (very dark) means that it offers poor contrast against most background colors, especially white and light shades. According to WCAG guidelines, sufficient contrast is crucial for users with visual impairments to perceive content effectively. Therefore, using IKB as text color on a white background, or vice versa, would fail accessibility standards. To improve accessibility, consider using IKB sparingly for decorative elements only. If it's essential to use IKB for text or interactive elements, pair it with very light shades of yellow or even near-white hues to ensure a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Tools like contrast checkers can help verify compliance with accessibility standards. Thorough testing with users who have low vision is also recommended.

Shades

Digital Color Formats

RGB
5 47 174
RGB5 47 174
Red
Green
Blue
HSL
225.09deg 94.41% 35.1%
225.0994.4135.1HSL
Hue
Saturation
Lightness
HWB
225.09deg 1.96% 31.76%
225.091.9631.76HWB
Hue
Whiteness
Blackness
hex#052FAE
rgb5 47 174
hsl225.09deg 94.41% 35.1%
cmyk97.13% 72.99% 0% 31.76%
hwb225.09deg 1.96% 31.76%
xyz-d650.09 0.05 0.41
oklch0.3872 0.2033 264.02
oklab0.3872 -0.02 -0.2
CMYK
97.13% 72.99% 0% 31.76%
97.1372.99031.76CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.41
0.090.050.41XYZ
X
Y
Z
OKLCH
0.3872 0.2033 264.02
0.38720.2033264.02LCH
Lightness
Chroma
Hue
OKLAB
0.3872 -0.02 -0.2
0.3872-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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