International Klein Blue

#042FB0

About International Klein Blue

International Klein Blue (IKB), represented by the hex code #042FB0, is a deep, vivid shade of blue originally mixed by the French artist Yves Klein. Klein registered this color as a trademark in 1957, and it has since become an iconic hue in the art world. What sets IKB apart is its matte finish, achieved by suspending pure color pigment in a synthetic resin. This matte finish enhances the intensity of the blue, creating a striking visual effect. IKB is not just a color; it's a cultural phenomenon, symbolizing artistic innovation and a specific aesthetic sensibility. Its unique character has made it a favorite among artists, designers, and anyone seeking a bold and impactful visual statement. Its history and unique characteristics make it an interesting and unique choice in any design field.

The hex color #042FB0, also known as International Klein Blue, presents significant accessibility challenges, especially in web design. Its extremely dark hue results in low contrast against typical light backgrounds, making text and interface elements difficult to read for users, particularly those with visual impairments. According to WCAG guidelines, sufficient contrast ratios are crucial for readability. To improve accessibility, consider using #042FB0 sparingly, primarily for decorative elements or accents. When used with text, pair it with very light colors like #FFFFFF or #F0F0F0 to ensure a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Moreover, always provide alternative text descriptions for images using this color to accommodate screen reader users. Thoroughly testing your designs with accessibility evaluation tools and user feedback is essential to ensure an inclusive user experience.

Shades

Digital Color Formats

RGB
4 47 176
RGB4 47 176
Red
Green
Blue
HSL
225deg 95.56% 35.29%
22595.5635.29HSL
Hue
Saturation
Lightness
HWB
225deg 1.57% 30.98%
2251.5730.98HWB
Hue
Whiteness
Blackness
hex#042FB0
rgb4 47 176
hsl225deg 95.56% 35.29%
cmyk97.73% 73.3% 0% 30.98%
hwb225deg 1.57% 30.98%
xyz-d650.09 0.05 0.42
oklch0.3892 0.2059 263.94
oklab0.3892 -0.02 -0.2
CMYK
97.73% 73.3% 0% 30.98%
97.7373.3030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.42
0.090.050.42XYZ
X
Y
Z
OKLCH
0.3892 0.2059 263.94
0.38920.2059263.94LCH
Lightness
Chroma
Hue
OKLAB
0.3892 -0.02 -0.2
0.3892-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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