International Klein Blue

#0436B0

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 best expressed his concept of the infinite and immaterial. The color's richness and intensity are due to its high concentration of ultramarine pigment, combined with a special synthetic resin binder that suspends the pigment and allows it to retain its brilliance. IKB is more than just a color; it is a symbol of artistic expression and innovation, representing the artist's exploration of the boundaries between art and experience. It has since been trademarked and is instantly recognizable.

The hex color #0436B0, also known as International Klein Blue, presents some accessibility challenges, particularly concerning color contrast. When used as a background color, it's crucial to pair it with a very light text color, such as white (#FFFFFF), to ensure sufficient contrast ratio as per WCAG guidelines. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Using darker text colors against this deep blue can make content difficult to read for users with visual impairments. Therefore, careful consideration and testing with accessibility tools are essential to guarantee readability and an inclusive user experience. Also avoid using it for essential UI elements without a proper contrast.

Shades

Digital Color Formats

RGB
4 54 176
RGB4 54 176
Red
Green
Blue
HSL
222.56deg 95.56% 35.29%
222.5695.5635.29HSL
Hue
Saturation
Lightness
HWB
222.56deg 1.57% 30.98%
222.561.5730.98HWB
Hue
Whiteness
Blackness
hex#0436B0
rgb4 54 176
hsl222.56deg 95.56% 35.29%
cmyk97.73% 69.32% 0% 30.98%
hwb222.56deg 1.57% 30.98%
xyz-d650.09 0.06 0.42
oklch0.401 0.1983 263.3
oklab0.401 -0.02 -0.2
CMYK
97.73% 69.32% 0% 30.98%
97.7369.32030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.42
0.090.060.42XYZ
X
Y
Z
OKLCH
0.401 0.1983 263.3
0.4010.1983263.3LCH
Lightness
Chroma
Hue
OKLAB
0.401 -0.02 -0.2
0.401-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons