International Klein Blue

#0231AB

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 patented this color to maintain its unique identity and association with his art. The color is particularly notable for its intensity and purity, as it lacks the subtle nuances found in many other blue pigments. Chemically, it is an ultramarine pigment, known for its vibrant and long-lasting qualities. In the art world, IKB is often associated with concepts of infinity, spirituality, and the boundless nature of creativity. It is a color that evokes strong emotional responses and has been used to create powerful visual statements across various art forms. Its unique historical context and artistic significance contribute to its enduring appeal.

The hex color #0231ab, also known as International Klein Blue, presents several accessibility considerations for web developers. Its dark hue means it requires careful selection of foreground text colors to ensure sufficient contrast for readability. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Therefore, using white or very light shades of yellow or gray as the foreground color would be crucial. For users with visual impairments, including those with low vision or color blindness, inadequate contrast can make text illegible. Developers should use tools to check the contrast ratio between #0231ab and any text placed on top of it, and adjust colors as needed to meet accessibility standards. Furthermore, it's wise to avoid relying solely on color to convey important information; supplement it with text labels or icons to cater to all users.

Shades

Digital Color Formats

RGB
2 49 171
RGB2 49 171
Red
Green
Blue
HSL
223.31deg 97.69% 33.92%
223.3197.6933.92HSL
Hue
Saturation
Lightness
HWB
223.31deg 0.78% 32.94%
223.310.7832.94HWB
Hue
Whiteness
Blackness
hex#0231AB
rgb2 49 171
hsl223.31deg 97.69% 33.92%
cmyk98.83% 71.35% 0% 32.94%
hwb223.31deg 0.78% 32.94%
xyz-d650.08 0.05 0.39
oklch0.3867 0.1979 263.42
oklab0.3867 -0.02 -0.2
CMYK
98.83% 71.35% 0% 32.94%
98.8371.35032.94CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.05 0.39
0.080.050.39XYZ
X
Y
Z
OKLCH
0.3867 0.1979 263.42
0.38670.1979263.42LCH
Lightness
Chroma
Hue
OKLAB
0.3867 -0.02 -0.2
0.3867-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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