International Klein Blue

#0435AB

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. IKB's visual impact comes from its heavy reliance on Ultramarine pigment, as well as Klein's innovative use of a synthetic resin binder, which allowed the pigment to maintain its brilliance and powdery texture. This specific shade of blue is renowned for its intensity and evocative qualities, often associated with the boundless expanse of the sky or sea. Yves Klein registered this color as a trademark in 1957, solidifying its place in art history. Beyond its artistic significance, IKB has found applications in various fields, including fashion, interior design, and web development, where its striking aesthetic can be leveraged to create visually compelling designs. Its unique luminosity and depth continue to captivate and inspire creatives across different disciplines.

The hex color #0435ab, also known as International Klein Blue, presents some accessibility challenges, particularly concerning color contrast. When used as a background color, it requires very light text to ensure readability, ideally white or near-white hues. Conversely, as a text color, it needs a background that is sufficiently light to provide adequate contrast. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Given the darkness of #0435ab, it's crucial to verify that any color pairings meet these contrast requirements to cater to users with visual impairments. Utilizing color contrast checking tools during the design phase is highly advisable to ensure that content is accessible to all users, irrespective of their visual abilities. Consideration of alternative color combinations might be necessary if contrast levels are insufficient.

Shades

Digital Color Formats

RGB
4 53 171
RGB4 53 171
Red
Green
Blue
HSL
222.4deg 95.43% 34.31%
222.495.4334.31HSL
Hue
Saturation
Lightness
HWB
222.4deg 1.57% 32.94%
222.41.5732.94HWB
Hue
Whiteness
Blackness
hex#0435AB
rgb4 53 171
hsl222.4deg 95.43% 34.31%
cmyk97.66% 69.01% 0% 32.94%
hwb222.4deg 1.57% 32.94%
xyz-d650.09 0.06 0.39
oklch0.394 0.1932 263.23
oklab0.394 -0.02 -0.19
CMYK
97.66% 69.01% 0% 32.94%
97.6669.01032.94CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.39
0.090.060.39XYZ
X
Y
Z
OKLCH
0.394 0.1932 263.23
0.3940.1932263.23LCH
Lightness
Chroma
Hue
OKLAB
0.394 -0.02 -0.19
0.394-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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