International Klein Blue

#002BB4

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. Klein registered this vivid color as a trademark in 1957. The visual impact of IKB comes from its reliance on ultramarine pigment, as well as Klein's matte, synthetic resin binder that allows the pigment to maintain its brilliance. This specific shade of blue is known for its high saturation and perceived depth. It became an essential characteristic of Klein's paintings, sculptures, and performances, symbolizing his exploration of the infinite and the immaterial. IKB is not just a color; it represents a concept and an artistic identity, frequently associated with innovation and visionary art. The process to create this color is complex and requires a skilled chemist to make it properly.

The hex color #002bb4, also known as International Klein Blue, presents certain accessibility challenges, particularly in text-based contexts. Its low lightness value (small Y in the YIQ color space) means that text rendered in this color requires high-contrast backgrounds to ensure readability for users, including those with visual impairments. According to WCAG guidelines, sufficient contrast ratios are essential for meeting accessibility standards. When using #002bb4 for text, it's crucial to pair it with light backgrounds like white (#ffffff) or very light grays to achieve a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Using darker backgrounds with #002bb4 can make text difficult or impossible to read for many users. Furthermore, consider providing alternative visual cues beyond color alone to convey information, ensuring accessibility for colorblind individuals. Employing ARIA attributes can also enhance accessibility by providing screen readers with additional context about the color's purpose and meaning on the page.

Shades

Digital Color Formats

RGB
0 43 180
RGB0 43 180
Red
Green
Blue
HSL
225.67deg 100% 35.29%
225.6710035.29HSL
Hue
Saturation
Lightness
HWB
225.67deg 0% 29.41%
225.67029.41HWB
Hue
Whiteness
Blackness
hex#002BB4
rgb0 43 180
hsl225.67deg 100% 35.29%
cmyk100% 76.11% 0% 29.41%
hwb225.67deg 0% 29.41%
xyz-d650.09 0.05 0.44
oklch0.3869 0.2152 263.8
oklab0.3869 -0.02 -0.21
CMYK
100% 76.11% 0% 29.41%
10076.11029.41CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.44
0.090.050.44XYZ
X
Y
Z
OKLCH
0.3869 0.2152 263.8
0.38690.2152263.8LCH
Lightness
Chroma
Hue
OKLAB
0.3869 -0.02 -0.21
0.3869-0.02-0.21LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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