International Klein Blue

#0428B0

About International Klein Blue

International Klein Blue, represented by the hexadecimal color code #0428B0, is a deep, intense shade of blue originally conceived by the French artist Yves Klein. Klein collaborated with a paint supplier to create a matte version of this ultramarine pigment, which he registered as International Klein Blue (IKB) in 1957. This color is known for its remarkable depth and intensity, creating a captivating visual experience. Its unique properties stem from its ability to absorb a significant amount of light, contributing to its characteristic vibrancy. In digital design, #0428B0 can be used to evoke feelings of trust, stability, and sophistication. However, it should be applied thoughtfully to ensure readability and accessibility.

The hex color #0428B0, also known as International Klein Blue, presents some accessibility challenges, particularly concerning color contrast. When used as a background color, it requires a very light text color to ensure sufficient contrast for readability. According to WCAG guidelines, the contrast ratio between text and background should be at least 4.5:1 for normal text and 3:1 for large text. Due to the darkness of #0428B0, lighter shades of white, off-white, or very light grays are recommended for text. It's crucial to test color combinations using accessibility tools to verify compliance. Also, consider users with visual impairments; avoid using color as the sole means of conveying information. Provide alternative cues like text labels or icons to ensure inclusivity. Using this color for interactive elements also requires careful consideration for focus states to maintain accessibility.

Shades

Digital Color Formats

RGB
4 40 176
RGB4 40 176
Red
Green
Blue
HSL
227.44deg 95.56% 35.29%
227.4495.5635.29HSL
Hue
Saturation
Lightness
HWB
227.44deg 1.57% 30.98%
227.441.5730.98HWB
Hue
Whiteness
Blackness
hex#0428B0
rgb4 40 176
hsl227.44deg 95.56% 35.29%
cmyk97.73% 77.27% 0% 30.98%
hwb227.44deg 1.57% 30.98%
xyz-d650.09 0.05 0.42
oklch0.3786 0.2128 264.37
oklab0.3786 -0.02 -0.21
CMYK
97.73% 77.27% 0% 30.98%
97.7377.27030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.42
0.090.050.42XYZ
X
Y
Z
OKLCH
0.3786 0.2128 264.37
0.37860.2128264.37LCH
Lightness
Chroma
Hue
OKLAB
0.3786 -0.02 -0.21
0.3786-0.02-0.21LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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