International Klein Blue

#0517AF

About International Klein Blue

International Klein Blue (IKB), identified by the hex code #0517af, is a deep shade of blue first mixed by the French artist Yves Klein. Klein created IKB as part of his search to find a color that best represented his concept of pure idea. The visual impact of IKB comes from its heavy reliance on ultramarine pigment, as well as Klein's strategy of using a matte, synthetic resin binder, which allows the pigment to maintain its color characteristics as much as possible. IKB is a vivid, ultramarine blue that possesses a unique intensity and depth, setting it apart from other shades of blue. It is now a registered trademark and continues to inspire artists, designers, and color enthusiasts worldwide, due to its unique history and captivating visual presence.

The hex color #0517af, representing International Klein Blue, presents significant accessibility challenges, particularly in text-based applications. Its very low luminance (brightness) results in extremely poor contrast against typical light backgrounds like white. This severely hinders readability for users with visual impairments, including those with low vision or color blindness. According to WCAG guidelines, sufficient contrast ratios are essential for ensuring web content is perceivable. To mitigate these issues, it's crucial to pair #0517af with very light colors, ideally whites or near-whites, for text or interactive elements. Employing contrast checking tools during the design process helps guarantee compliance with accessibility standards, ensuring a more inclusive and user-friendly experience for everyone. Furthermore, providing alternative styling options allows users to customize the display according to their preferences and visual needs.

Shades

Digital Color Formats

RGB
5 23 175
RGB5 23 175
Red
Green
Blue
HSL
233.65 94.44% 35.29%
233.6594.4435.29HSL
Hue
Saturation
Lightness
HWB
233.65 1.96% 31.37%
233.651.9631.37HWB
Hue
Whiteness
Blackness
hex#0517AF
rgb5 23 175
hsl233.65 94.44% 35.29%
cmyk97.14% 86.86% 0% 31.37%
hwb233.65 1.96% 31.37%
xyz8.11 3.74 40.85
CMYK
97.14% 86.86% 0% 31.37%
97.1486.86031.37CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.11 3.74 40.85
8.113.7440.85XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

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