International Klein Blue

#0A2CAA

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. It is known for its intense saturation and visual impact, achieved through a specific formula involving a synthetic ultramarine pigment. Klein registered this color under patent in 1957, aiming to preserve its unique qualities. The color evokes a sense of depth and infinity, and Klein used it extensively in his monochrome paintings and sculptures. Due to its unique history and distinctive appearance, IKB has become highly recognizable and continues to be used and referenced in various artistic and commercial contexts today. It is a truly iconic shade of blue.

The color #0A2CAA, also known as International Klein Blue, presents some accessibility challenges. Its dark hue means it generally needs to be paired with very light text to ensure sufficient contrast for readability. According to WCAG guidelines, the contrast ratio between text and background should be at least 4.5:1 for normal text and 3:1 for large text. When using #0A2CAA as a background, using white (#FFFFFF) or very light yellow (#FFFFE0) text is advisable. Tools like contrast checkers can help to verify compliance. Avoid pairing it with dark or mid-tone colors, as the contrast will likely be insufficient for users, especially those with visual impairments. Additionally, consider providing alternative visual cues besides color alone to convey information, as colorblind users may not perceive the color accurately. Semantic HTML and ARIA attributes can help to improve accessibility further.

Shades

Digital Color Formats

RGB
10 44 170
RGB10 44 170
Red
Green
Blue
HSL
227.25deg 88.89% 35.29%
227.2588.8935.29HSL
Hue
Saturation
Lightness
HWB
227.25deg 3.92% 33.33%
227.253.9233.33HWB
Hue
Whiteness
Blackness
hex#0A2CAA
rgb10 44 170
hsl227.25deg 88.89% 35.29%
cmyk94.12% 74.12% 0% 33.33%
hwb227.25deg 3.92% 33.33%
xyz-d650.08 0.05 0.39
oklch0.3789 0.2009 264.8
oklab0.3789 -0.02 -0.2
CMYK
94.12% 74.12% 0% 33.33%
94.1274.12033.33CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.05 0.39
0.080.050.39XYZ
X
Y
Z
OKLCH
0.3789 0.2009 264.8
0.37890.2009264.8LCH
Lightness
Chroma
Hue
OKLAB
0.3789 -0.02 -0.2
0.3789-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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