International Klein Blue

#0024B4

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. This particular shade was synthetically created and then patented by Klein as a visual shortcut to convey his concept of pure space and the immaterial. IKB's unique matte finish further enhances its impact by maximizing the impression of color depth. The color is achieved using a specific proportion of ultramarine pigment suspended in a synthetic resin binder, and this composition is key to its striking visual effect. Since its inception, IKB has been celebrated for its intensity and is used in a variety of artistic, design, and commercial applications, continuing to evoke a sense of the infinite.

International Klein Blue (#0024B4) offers a strong visual presence, but its deep hue presents accessibility challenges, especially when used for text. According to WCAG guidelines, sufficient contrast between text and background is crucial for readability. When using #0024B4 for text, it's imperative to choose a very light background color like #FFFFFF or #F0F0F0 to ensure a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Conversely, using #0024B4 as a background color requires a light-colored text, such as white or pale yellow, to maintain readability. Avoid pairing #0024B4 with mid-tone or dark colors, as this will likely result in insufficient contrast and make content difficult to read for users, especially those with visual impairments. Consider tools like contrast checkers to verify compliance with accessibility standards before finalizing your design.

Shades

Digital Color Formats

RGB
0 36 180
RGB0 36 180
Red
Green
Blue
HSL
228 100% 35.29%
22810035.29HSL
Hue
Saturation
Lightness
HWB
228 0% 29.41%
228029.41HWB
Hue
Whiteness
Blackness
hex#0024B4
rgb0 36 180
hsl228 100% 35.29%
cmyk100% 80% 0% 29.41%
hwb228 0% 29.41%
xyz8.87 4.56 43.59
CMYK
100% 80% 0% 29.41%
10080029.41CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.87 4.56 43.59
8.874.5643.59XYZ
X
Y
Z

Alternative colors

Applications

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