International Klein Blue

#031BB1

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein registered this vivid shade as a trademark in 1957. The intensity of IKB is achieved through its heavy reliance on ultramarine pigment and a unique matte synthetic resin binder, which maintains the color's brilliance by preventing the pigment particles from becoming suspended in the resin, thus preserving the original intensity of the color. This particular blue evokes a sense of infinity, spirituality, and the sublime, deeply connected to Klein's artistic vision. It has been prominently featured in his monochromatic paintings and sculptures, aiming to detach color from form and convey pure feeling. Its use extends beyond the art world, appearing in fashion, interior design, and branding, symbolizing innovation and depth.

The color #031BB1, also known as International Klein Blue, presents some accessibility challenges primarily due to its low luminance. When used as a background color, it requires very light text (ideally white or near-white) to ensure sufficient contrast for readability. According to WCAG guidelines, the contrast ratio between the text and background should be at least 4.5:1 for normal text and 3:1 for large text to meet AA standards. Given the darkness of #031BB1, careful consideration is needed to select appropriate text colors and sizes to meet these ratios. In practical terms, it might be more suitable for decorative elements or as an accent color rather than for extensive text blocks. Also, users with visual impairments might struggle to differentiate elements if neighboring colors have low contrast with #031BB1. It's crucial to test color combinations with accessibility tools to ensure compliance and optimal user experience. Use of this color should always be paired with high contrast elements.

Shades

Digital Color Formats

RGB
3 27 177
RGB3 27 177
Red
Green
Blue
HSL
231.72deg 96.67% 35.29%
231.7296.6735.29HSL
Hue
Saturation
Lightness
HWB
231.72deg 1.18% 30.59%
231.721.1830.59HWB
Hue
Whiteness
Blackness
hex#031BB1
rgb3 27 177
hsl231.72deg 96.67% 35.29%
cmyk98.31% 84.75% 0% 30.59%
hwb231.72deg 1.18% 30.59%
xyz-d650.08 0.04 0.42
oklch0.3635 0.2248 264.6
oklab0.3635 -0.02 -0.22
CMYK
98.31% 84.75% 0% 30.59%
98.3184.75030.59CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.04 0.42
0.080.040.42XYZ
X
Y
Z
OKLCH
0.3635 0.2248 264.6
0.36350.2248264.6LCH
Lightness
Chroma
Hue
OKLAB
0.3635 -0.02 -0.22
0.3635-0.02-0.22LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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