International Klein Blue

#0135B3

About International Klein Blue

International Klein Blue, represented by the hexadecimal color code #0135B3, is a deep and intense shade of blue. It is known for its exceptional purity and depth. The color was developed by Yves Klein, a French artist, in collaboration with a paint supplier, specifically to achieve the most vivid expression of blue possible. Klein patented the color in 1957, ensuring its unique status. The color is achieved through a specific formula involving a synthetic resin binder that allows the pigment to maintain its intensity. The intense nature of International Klein Blue has made it a favorite for artists and designers seeking a color that commands attention and evokes a sense of depth and infinity. In RGB terms, it consists of 01 red, 35 green, and B3 blue.

The hex color #0135b3, also known as International Klein Blue, presents significant accessibility challenges, particularly in web design. Its very dark hue results in low contrast against light backgrounds, making text and other elements difficult to read for users with visual impairments. According to WCAG guidelines, sufficient contrast between text and background is crucial for accessibility. To meet these guidelines, designers should avoid using #0135b3 for text or interactive elements on light backgrounds. If it must be used, ensure a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Pairing it with a very light color like #ffffff or #f0f0f0 would be necessary. Providing alternative high-contrast themes is also a beneficial approach to enhance accessibility. Furthermore, consider providing sufficient non-color cues to ensure content is accessible to color-blind users. Overall, careful consideration and mitigation strategies are essential to ensure the accessibility of designs incorporating #0135b3.

Shades

Digital Color Formats

RGB
1 53 179
RGB1 53 179
Red
Green
Blue
HSL
222.47deg 98.89% 35.29%
222.4798.8935.29HSL
Hue
Saturation
Lightness
HWB
222.47deg 0.39% 29.8%
222.470.3929.8HWB
Hue
Whiteness
Blackness
hex#0135B3
rgb1 53 179
hsl222.47deg 98.89% 35.29%
cmyk99.44% 70.39% 0% 29.8%
hwb222.47deg 0.39% 29.8%
xyz-d650.09 0.06 0.43
oklch0.4019 0.2035 263.18
oklab0.4019 -0.02 -0.2
CMYK
99.44% 70.39% 0% 29.8%
99.4470.39029.8CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.43
0.090.060.43XYZ
X
Y
Z
OKLCH
0.4019 0.2035 263.18
0.40190.2035263.18LCH
Lightness
Chroma
Hue
OKLAB
0.4019 -0.02 -0.2
0.4019-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons