International Klein Blue

#0133A8

About International Klein Blue

International Klein Blue (IKB), with the hex code #0133A8, is a deep blue hue first mixed by the French artist Yves Klein. Klein registered this color as a trademark in 1957. The visual impact of IKB comes from its reliance on ultramarine pigment, as well as Klein's technique of suspending the dry pigment in a synthetic resin, which maintains the color's original qualities. The color is strongly associated with Klein's monochromatic paintings, and he believed that this color could represent the most perfect expression of blue. Its intensity and purity give a sense of depth and infinity, often used to evoke feelings of wonder and spirituality. It is particularly well-known for its use in modern and contemporary art. The color is often recreated with a different chemical formula than the original.

When using #0133A8 (International Klein Blue) on websites, ensuring sufficient contrast is crucial for readability, especially for users with visual impairments. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Using a light color like white or a very pale yellow as the text color on a background of #0133A8 would help meet these requirements. Tools are available to check the contrast ratio between foreground and background colors. Also, consider providing alternative styling options to cater to individual user preferences. Proper use of ARIA labels further enhances accessibility for screen reader users.

Shades

Digital Color Formats

RGB
1 51 168
RGB1 51 168
Red
Green
Blue
HSL
222.04deg 98.82% 33.14%
222.0498.8233.14HSL
Hue
Saturation
Lightness
HWB
222.04deg 0.39% 34.12%
222.040.3934.12HWB
Hue
Whiteness
Blackness
hex#0133A8
rgb1 51 168
hsl222.04deg 98.82% 33.14%
cmyk99.4% 69.64% 0% 34.12%
hwb222.04deg 0.39% 34.12%
xyz-d650.08 0.05 0.38
oklch0.3867 0.1921 263
oklab0.3867 -0.02 -0.19
CMYK
99.4% 69.64% 0% 34.12%
99.469.64034.12CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.05 0.38
0.080.050.38XYZ
X
Y
Z
OKLCH
0.3867 0.1921 263
0.38670.1921263LCH
Lightness
Chroma
Hue
OKLAB
0.3867 -0.02 -0.19
0.3867-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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