International Klein Blue

#0523AF

About International Klein Blue

The color #0523af, commonly known as International Klein Blue (IKB), is a deep, vivid shade of blue that was developed by the French artist Yves Klein. Klein patented the color in 1957, ensuring its unique and distinctive identity. IKB is characterized by its intense, almost ultramarine hue, which Klein believed embodied pure space and the infinite. The pigment is created using a synthetic ultramarine pigment mixed with a special resin binder, which preserves the color's luminosity and intensity. This particular shade of blue has become iconic in the art world and is associated with Klein's monochromatic paintings and sculptures. The color is registered as a trademark. IKB is known for its ability to evoke feelings of depth, spirituality, and the sublime. Its unique properties make it highly sought after in various design and artistic applications.

The hex color #0523af, also known as International Klein Blue, presents significant accessibility challenges, particularly in web design. Its extremely dark hue results in very low contrast against lighter backgrounds, making text and interface elements difficult to read for users with visual impairments. According to WCAG guidelines, sufficient contrast ratios are crucial for readability. For normal text (14 points and larger), a contrast ratio of at least 4.5:1 is recommended, while large text (18 points and larger) requires a minimum of 3:1. Given the darkness of #0523af, achieving these ratios necessitates using very light foreground colors, which can still strain the eyes due to the stark contrast. It is important to consider that individuals with color blindness may not perceive this color accurately, further complicating accessibility considerations. Using color contrast checkers to ensure sufficient contrast is important.

Shades

Digital Color Formats

RGB
5 35 175
RGB5 35 175
Red
Green
Blue
HSL
229.41 94.44% 35.29%
229.4194.4435.29HSL
Hue
Saturation
Lightness
HWB
229.41 1.96% 31.37%
229.411.9631.37HWB
Hue
Whiteness
Blackness
hex#0523AF
rgb5 35 175
hsl229.41 94.44% 35.29%
cmyk97.14% 80% 0% 31.37%
hwb229.41 1.96% 31.37%
xyz8.4 4.33 40.95
CMYK
97.14% 80% 0% 31.37%
97.1480031.37CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.4 4.33 40.95
8.44.3340.95XYZ
X
Y
Z

Alternative colors

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