International Klein Blue

#0B33A9

About International Klein Blue

International Klein Blue, also known as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Its vivid and intense quality results from its heavy reliance on ultramarine pigment. Klein patented the color in 1957 to preserve its unique identity and ensure it remained associated with his artistic creations. The color is intended to evoke a sense of boundlessness and spiritual depth, which was central to Klein's artistic philosophy. The intense color is considered a monochrome, or a color having one hue. Its impact on the art world has been significant, with artists and designers continuing to use IKB to create striking and memorable visual experiences. Its unique qualities make it difficult to reproduce accurately on screens and in print, adding to its mystique and allure. The usage of this color should be carefully managed to fully appreciate its deepness.

The hex color #0b33a9, also known as International Klein Blue, presents specific accessibility challenges that web developers must carefully consider. Due to its deep, saturated nature, it offers low contrast when paired with lighter shades. According to WCAG guidelines, sufficient contrast is vital for users with visual impairments to distinguish text and interactive elements effectively. To ensure accessibility, it is crucial to use a very light color for text and interactive elements placed on a #0b33a9 background, or conversely, use #0b33a9 for text on a very light background. Tools are available to measure contrast ratios, aiming for a minimum of 4.5:1 for normal text and 3:1 for large text. If the contrast is insufficient, consider adjusting the color by lightening it slightly to improve visibility while maintaining the desired aesthetic. Also, provide alternative visual cues, such as icons or underlines, for links to accommodate users who may have difficulty perceiving color differences. Thorough testing with accessibility evaluation tools is essential to validate that the design meets accessibility standards.

Shades

Digital Color Formats

RGB
11 51 169
RGB11 51 169
Red
Green
Blue
HSL
224.81deg 87.78% 35.29%
224.8187.7835.29HSL
Hue
Saturation
Lightness
HWB
224.81deg 4.31% 33.73%
224.814.3133.73HWB
Hue
Whiteness
Blackness
hex#0B33A9
rgb11 51 169
hsl224.81deg 87.78% 35.29%
cmyk93.49% 69.82% 0% 33.73%
hwb224.81deg 4.31% 33.73%
xyz-d650.08 0.05 0.38
oklch0.3896 0.192 264.22
oklab0.3896 -0.02 -0.19
CMYK
93.49% 69.82% 0% 33.73%
93.4969.82033.73CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.05 0.38
0.080.050.38XYZ
X
Y
Z
OKLCH
0.3896 0.192 264.22
0.38960.192264.22LCH
Lightness
Chroma
Hue
OKLAB
0.3896 -0.02 -0.19
0.3896-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons