International Klein Blue

#0631AE

About International Klein Blue

The hex color #0631AE, also known as International Klein Blue (IKB), is a deep and intense shade of blue. It is particularly renowned for its historical association with the French artist Yves Klein, who registered a patent for this unique hue to establish its exclusivity in the art world. IKB is characterized by its high saturation and brilliance, making it a visually striking and memorable color. In the RGB color model, it is composed of 2.4% red, 19.2% green, and 68.2% blue. Its perceived intensity is due to the specific mix of pigments that create the deep tone, which gives objects painted with IKB a mesmerizing, almost ethereal quality. Because of its uniqueness and its link to art history, this color has a certain weight. IKB is mostly used in art, graphic design and fashion.

The color #0631AE, a deep and saturated blue, presents significant accessibility challenges, particularly in web design. Its low lightness value (around 6%) means that it requires very light text (ideally white or near-white) to ensure sufficient contrast for readability. According to WCAG guidelines, the contrast ratio between text and background should be at least 4.5:1 for normal text and 3:1 for large text to meet AA standards. Using #0631AE as a background color with dark text will almost certainly fail these contrast tests, making content inaccessible to users with visual impairments. Developers must carefully choose foreground colors and consider using color contrast tools to verify compliance with accessibility standards. Alternatives include lighter shades of blue or using #0631AE sparingly, paired with high-contrast elements, to ensure inclusivity. Furthermore, avoid using color alone to convey information, as users who are colorblind may not be able to distinguish it.

Shades

Digital Color Formats

RGB
6 49 174
RGB6 49 174
Red
Green
Blue
HSL
224.64deg 93.33% 35.29%
224.6493.3335.29HSL
Hue
Saturation
Lightness
HWB
224.64deg 2.35% 31.76%
224.642.3531.76HWB
Hue
Whiteness
Blackness
hex#0631AE
rgb6 49 174
hsl224.64deg 93.33% 35.29%
cmyk96.55% 71.84% 0% 31.76%
hwb224.64deg 2.35% 31.76%
xyz-d650.09 0.05 0.41
oklch0.3907 0.201 263.96
oklab0.3907 -0.02 -0.2
CMYK
96.55% 71.84% 0% 31.76%
96.5571.84031.76CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.41
0.090.050.41XYZ
X
Y
Z
OKLCH
0.3907 0.201 263.96
0.39070.201263.96LCH
Lightness
Chroma
Hue
OKLAB
0.3907 -0.02 -0.2
0.3907-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons