International Klein Blue

#081FC2

About International Klein Blue

International Klein Blue, often referred to as IKB, is a deep blue hue first mixed by the French artist Yves Klein. The color's striking vibrancy and intensity made it a signature element of his art, particularly his monochrome paintings. Klein registered the color as a trademark in France in 1957, solidifying its association with his artistic vision. IKB's unique formulation involves a synthetic ultramarine pigment suspended in a resin binder, which allows the color to retain its luminosity and saturation. This results in a color that appears almost otherworldly, captivating viewers with its depth and purity. The color is also used by brands, fashion, and webdesigners.

The color #081FC2, a deep and vibrant blue, presents significant accessibility challenges, especially when used as a foreground color against a white or light-colored background. Its low luminance value necessitates careful consideration of color contrast ratios to ensure readability for users with visual impairments. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is required for normal text and 3:1 for large text. This blue hue often falls short of these recommendations, potentially making text difficult to read for individuals with low vision or color blindness. To improve accessibility, consider pairing #081FC2 with a very light or even white foreground color to maximize contrast. Alternatively, avoid using this color for text altogether and reserve it for decorative elements or interactive components where the contrast requirements are less stringent. Providing sufficient contrast ensures that content is perceivable and usable by a wider audience, aligning with inclusive design principles.

Shades

Digital Color Formats

RGB
8 31 194
RGB8 31 194
Red
Green
Blue
HSL
232.58deg 92.08% 39.61%
232.5892.0839.61HSL
Hue
Saturation
Lightness
HWB
232.58deg 3.14% 23.92%
232.583.1423.92HWB
Hue
Whiteness
Blackness
hex#081FC2
rgb8 31 194
hsl232.58deg 92.08% 39.61%
cmyk95.88% 84.02% 0% 23.92%
hwb232.58deg 3.14% 23.92%
xyz-d650.1 0.05 0.51
oklch0.3903 0.2398 265.05
oklab0.3903 -0.02 -0.24
CMYK
95.88% 84.02% 0% 23.92%
95.8884.02023.92CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.1 0.05 0.51
0.10.050.51XYZ
X
Y
Z
OKLCH
0.3903 0.2398 265.05
0.39030.2398265.05LCH
Lightness
Chroma
Hue
OKLAB
0.3903 -0.02 -0.24
0.3903-0.02-0.24LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons