International Klein Blue

#0420B0

About International Klein Blue

International Klein Blue, represented by the hexadecimal color code #0420B0, is a deep and intense shade of blue. It was developed by the French artist Yves Klein in collaboration with a Parisian paint dealer. Klein sought to create a blue that captured the essence of the sky and the sea, a blue that would evoke a sense of boundlessness and spirituality. The color is known for its unique ultramarine pigment, which gives it a distinctive matte appearance. It is achieved by suspending pure color pigment in a clear synthetic resin, retaining the pigments original qualities. This color is often associated with creativity, art, and the avant-garde, and remains a powerful symbol in the art world.

The color #0420B0, also known as International Klein Blue, presents significant accessibility challenges, particularly for users with visual impairments. Its extremely low luminance value results in very poor contrast against both white and light-colored backgrounds. This makes text and other interface elements using this color difficult to read, potentially excluding users with low vision or color blindness. To improve accessibility, it's crucial to pair this color with very light hues or white for sufficient contrast. Adhering to WCAG (Web Content Accessibility Guidelines) contrast ratios is essential. A contrast ratio of at least 4.5:1 for standard text and 3:1 for large text is recommended to ensure readability. Additionally, providing alternative visual cues besides color alone can further enhance accessibility for all users.

Shades

Digital Color Formats

RGB
4 32 176
RGB4 32 176
Red
Green
Blue
HSL
230.23 95.56% 35.29%
230.2395.5635.29HSL
Hue
Saturation
Lightness
HWB
230.23 1.57% 30.98%
230.231.5730.98HWB
Hue
Whiteness
Blackness
hex#0420B0
rgb4 32 176
hsl230.23 95.56% 35.29%
cmyk97.73% 81.82% 0% 30.98%
hwb230.23 1.57% 30.98%
xyz8.4 4.19 41.44
CMYK
97.73% 81.82% 0% 30.98%
97.7381.82030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.4 4.19 41.44
8.44.1941.44XYZ
X
Y
Z

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