International Klein Blue

#0038A8

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. IKB's visual impact comes from its heavy reliance on ultramarine pigment, as well as Klein's artistic vision. The color is a specific shade of blue, achieved by using a synthetic ultramarine pigment mixed with a special transparent resin binder. This binder allows the pigment to maintain its brilliance and intensity, making the color appear exceptionally vibrant and pure. Klein registered IKB as a trademark in 1957, although the trademark is now expired. The color has since become iconic in the art world and beyond, often associated with creativity, innovation, and a sense of boundless possibility. It is used today in a variety of applications, from high fashion to branding and design.

The hex color #0038A8, also known as International Klein Blue, presents some accessibility challenges, particularly in text-based applications. Its deep hue results in a relatively low contrast ratio when paired with lighter background colors, potentially making it difficult for users with visual impairments to read text rendered in this color. To improve accessibility, it's advisable to use #0038A8 with significantly lighter colors, such as white or very light shades of yellow or green, to ensure sufficient contrast, ideally aiming for a contrast ratio of at least 4.5:1 as recommended by WCAG guidelines. Utilizing tools to measure color contrast ratios can aid in confirming compliance with accessibility standards. Additionally, avoid using #0038A8 for crucial interactive elements without proper visual cues, as its distinctiveness might not be adequately perceived by all users.

Shades

Digital Color Formats

RGB
0 56 168
RGB0 56 168
Red
Green
Blue
HSL
220 100% 32.94%
22010032.94HSL
Hue
Saturation
Lightness
HWB
220 0% 34.12%
220034.12HWB
Hue
Whiteness
Blackness
hex#0038A8
rgb0 56 168
hsl220 100% 32.94%
cmyk100% 66.67% 0% 34.12%
hwb220 0% 34.12%
xyz8.48 5.66 37.69
CMYK
100% 66.67% 0% 34.12%
10066.67034.12CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.48 5.66 37.69
8.485.6637.69XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

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