International Klein Blue

#0A3AAA

General Information about International Klein Blue

International Klein Blue (IKB), represented by the hexadecimal color code #0A3AAA, is a deep blue hue first mixed by the French artist Yves Klein. Klein patented this color in 1957. It is renowned for its high saturation and unique visual impact. The color achieves its intense effect because of its reliance on ultramarine pigment, and its almost total lack of white or black admixture. Its strong association with modern art and its distinctive appearance make it a noteworthy and recognizable color in the art world and beyond. The color evokes feelings of depth, tranquility, and boundlessness, connecting it to concepts of spirituality and the infinite. Its vivid and captivating nature continues to inspire artists and designers across various disciplines.

The color #0A3AAA, also known as International Klein Blue (IKB), presents some accessibility challenges due to its relatively low lightness value. When used as a foreground color against a white or very light background, it might not meet the contrast ratios recommended by the Web Content Accessibility Guidelines (WCAG) for text legibility. Specifically, WCAG 2.1 requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text (14pt bold or 18pt regular). Therefore, it's crucial to pair IKB with a significantly lighter color to ensure readability for users, including those with visual impairments. Consider using a very light yellow, off-white, or a bright, desaturated hue as a background. Testing the color combination with accessibility tools is recommended to confirm compliance with WCAG standards. When using IKB for interactive elements, like buttons or links, ensure sufficient contrast for focus states to aid keyboard navigation.

Shades

Digital Color Formats

RGB
10 58 170
RGB10 58 170
Red
Green
Blue
HSL
222deg 88.89% 35.29%
22288.8935.29HSL
Hue
Saturation
Lightness
HWB
222deg 3.92% 33.33%
2223.9233.33HWB
Hue
Whiteness
Blackness
hex#0A3AAA
rgb10 58 170
hsl222deg 88.89% 35.29%
cmyk94.12% 65.88% 0% 33.33%
hwb222deg 3.92% 33.33%
xyz-d650.09 0.06 0.39
oklch0.4031 0.1853 263.18
oklab0.4031 -0.02 -0.18
CMYK
94.12% 65.88% 0% 33.33%
94.1265.88033.33CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.39
0.090.060.39XYZ
X
Y
Z
OKLCH
0.4031 0.1853 263.18
0.40310.1853263.18LCH
Lightness
Chroma
Hue
OKLAB
0.4031 -0.02 -0.18
0.4031-0.02-0.18LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons