International Klein Blue

#0B2EA9

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 patented this color to maintain its uniqueness and prevent its widespread reproduction. Chemically, it is a matte ultramarine blue achieved through a specific mixing process. The color is renowned for its intense saturation and depth, making it visually captivating. Klein believed that this particular blue embodied his concept of the infinite and the spiritual. IKB has been used extensively in art, design, and fashion to evoke emotions of serenity, depth, and transcendence. Its distinctive and patented nature has contributed to its enduring appeal and recognition worldwide.

The hex color #0B2EA9, also known as International Klein Blue (IKB), presents several accessibility considerations for web developers. Its relatively low lightness value signifies that it requires careful pairing with text and other foreground elements to ensure sufficient 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. When using #0B2EA9 as a background, white or very light colors are preferable for text to meet these standards. Moreover, avoid using this color alone to convey important information, as users with color vision deficiencies may not be able to distinguish it effectively. Supplement color cues with text labels or icons to provide alternative ways to access and understand the content. Thorough testing with accessibility evaluation tools and user feedback is crucial to ensure an inclusive user experience.

Shades

Digital Color Formats

RGB
11 46 169
RGB11 46 169
Red
Green
Blue
HSL
226.71deg 87.78% 35.29%
226.7187.7835.29HSL
Hue
Saturation
Lightness
HWB
226.71deg 4.31% 33.73%
226.714.3133.73HWB
Hue
Whiteness
Blackness
hex#0B2EA9
rgb11 46 169
hsl226.71deg 87.78% 35.29%
cmyk93.49% 72.78% 0% 33.73%
hwb226.71deg 4.31% 33.73%
xyz-d650.08 0.05 0.38
oklch0.3812 0.1974 264.74
oklab0.3812 -0.02 -0.2
CMYK
93.49% 72.78% 0% 33.73%
93.4972.78033.73CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.05 0.38
0.080.050.38XYZ
X
Y
Z
OKLCH
0.3812 0.1974 264.74
0.38120.1974264.74LCH
Lightness
Chroma
Hue
OKLAB
0.3812 -0.02 -0.2
0.3812-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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