International Klein Blue

#031EB9

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 vision about color reaching beyond what can be seen, something that has to be experienced. The mesmerizing quality of IKB lies in its ability to capture and reflect light, thus evoking a sense of the infinite. It is frequently associated with art, creativity, and a bold, distinctive aesthetic. This color has found its way into numerous design disciplines, including fashion, interior design, and web development, where its unique depth and intensity serve to draw attention and make a statement. Despite its aesthetic appeal, the accessibility of IKB must be carefully considered in digital applications.

The hex color #031eb9, also known as International Klein Blue, presents significant accessibility challenges due to its low luminance. When used as text, it will likely fail WCAG contrast guidelines against white or very light backgrounds. A contrast ratio of at least 4.5:1 is generally recommended for Level AA compliance, and 7:1 for Level AAA. Therefore, when employing this color, carefully consider its contrast against the background. Ensure sufficient contrast by using lighter text on a dark background or a lighter, contrasting background color. The use of larger text sizes (18pt or 14pt bold) can slightly improve readability. Additionally, provide alternative visual cues or text descriptions to ensure that information isn't solely conveyed through color, thereby catering to users with visual impairments or color blindness. Thorough testing with accessibility evaluation tools is highly advisable to guarantee optimal usability for all users.

Shades

Digital Color Formats

RGB
3 30 185
RGB3 30 185
Red
Green
Blue
HSL
231.1deg 96.81% 36.86%
231.196.8136.86HSL
Hue
Saturation
Lightness
HWB
231.1deg 1.18% 27.45%
231.11.1827.45HWB
Hue
Whiteness
Blackness
hex#031EB9
rgb3 30 185
hsl231.1deg 96.81% 36.86%
cmyk98.38% 83.78% 0% 27.45%
hwb231.1deg 1.18% 27.45%
xyz-d650.09 0.04 0.46
oklch0.3769 0.2314 264.55
oklab0.3769 -0.02 -0.23
CMYK
98.38% 83.78% 0% 27.45%
98.3883.78027.45CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.04 0.46
0.090.040.46XYZ
X
Y
Z
OKLCH
0.3769 0.2314 264.55
0.37690.2314264.55LCH
Lightness
Chroma
Hue
OKLAB
0.3769 -0.02 -0.23
0.3769-0.02-0.23LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons