International Klein Blue

#0A1FB4

About International Klein Blue

International Klein Blue, represented by the hexadecimal color code #0A1FB4, is a deep and intense shade of blue that is highly saturated and distinctive. It was developed by the French artist Yves Klein in collaboration with a Parisian paint dealer, aiming to capture the purest and most intense expression of blue. This color is known for its unique matte finish, which enhances its visual impact by absorbing light. Klein used a synthetic resin binder that allowed the pigment to maintain its brilliance and intensity, making it stand out from traditional blues. The color has become a symbol of modern art and has been widely used in various applications, from fashion to interior design, due to its captivating and powerful aesthetic.

The hex color #0A1FB4, also known as International Klein Blue, presents significant accessibility challenges, particularly in web design. Its dark hue results in a low luminance value, which means insufficient contrast when paired with lighter text colors like white or yellow. According to WCAG guidelines, sufficient contrast is crucial for readability, especially for users with visual impairments. A contrast ratio of at least 4.5:1 is recommended for standard text and 3:1 for large text. Using #0A1FB4 as a background with light text might fail these guidelines, making the content inaccessible. To improve accessibility, designers should consider using lighter shades of blue or pairing #0A1FB4 with very light, high-contrast colors. Tools like contrast checkers can help verify compliance with accessibility standards, ensuring a more inclusive user experience.

Shades

Digital Color Formats

RGB
10 31 180
RGB10 31 180
Red
Green
Blue
HSL
232.59deg 89.47% 37.25%
232.5989.4737.25HSL
Hue
Saturation
Lightness
HWB
232.59deg 3.92% 29.41%
232.593.9229.41HWB
Hue
Whiteness
Blackness
hex#0A1FB4
rgb10 31 180
hsl232.59deg 89.47% 37.25%
cmyk94.44% 82.78% 0% 29.41%
hwb232.59deg 3.92% 29.41%
xyz-d650.09 0.04 0.44
oklch0.3731 0.2241 265.4
oklab0.3731 -0.02 -0.22
CMYK
94.44% 82.78% 0% 29.41%
94.4482.78029.41CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.04 0.44
0.090.040.44XYZ
X
Y
Z
OKLCH
0.3731 0.2241 265.4
0.37310.2241265.4LCH
Lightness
Chroma
Hue
OKLAB
0.3731 -0.02 -0.22
0.3731-0.02-0.22LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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