International Klein Blue

#0530AF

About International Klein Blue

International Klein Blue, represented by the hexadecimal color code #0530AF, is a deep, vivid shade of blue famously associated with the French artist Yves Klein. Klein patented this particular shade in 1957 for its unique ultramarine hue, which he felt best captured the essence of pure blue. This color is created by suspending ultramarine pigment in a synthetic resin, which allows the pigment to retain its brilliance and intensity. Historically, ultramarine was made from lapis lazuli, making it an expensive and highly valued pigment, often reserved for important religious artworks. Today, synthetic ultramarine makes this vibrant blue more accessible, and International Klein Blue continues to inspire artists, designers, and color enthusiasts worldwide.

The hex color #0530AF, also known as International Klein Blue, presents several accessibility considerations for web developers. Its dark hue results in a low luminance value, meaning it requires careful pairing with text and other interface elements to ensure sufficient contrast. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. When using #0530AF as a background, white or very light colors are generally advisable for text to meet these standards. Tools for checking contrast ratios can help ensure compliance. Developers should also be mindful of colorblindness, where certain users might struggle to differentiate this blue from other colors. Providing alternative visual cues, such as icons or text labels, can enhance accessibility for all users, including those with visual impairments.

Shades

Digital Color Formats

RGB
5 48 175
RGB5 48 175
Red
Green
Blue
HSL
224.82deg 94.44% 35.29%
224.8294.4435.29HSL
Hue
Saturation
Lightness
HWB
224.82deg 1.96% 31.37%
224.821.9631.37HWB
Hue
Whiteness
Blackness
hex#0530AF
rgb5 48 175
hsl224.82deg 94.44% 35.29%
cmyk97.14% 72.57% 0% 31.37%
hwb224.82deg 1.96% 31.37%
xyz-d650.09 0.05 0.41
oklch0.3899 0.2035 263.96
oklab0.3899 -0.02 -0.2
CMYK
97.14% 72.57% 0% 31.37%
97.1472.57031.37CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.41
0.090.050.41XYZ
X
Y
Z
OKLCH
0.3899 0.2035 263.96
0.38990.2035263.96LCH
Lightness
Chroma
Hue
OKLAB
0.3899 -0.02 -0.2
0.3899-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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