International Klein Blue

#0138B3

About International Klein Blue

International Klein Blue (IKB), with the hex code #0138B3, is a deep shade of blue first mixed by the French artist Yves Klein. Klein patented IKB as a unique color in 1957. What sets IKB apart is its remarkable purity and intensity, achieved through a specific formula involving a synthetic resin binder that suspends the blue pigment and allows it to retain its brilliance and depth. The color is intended to evoke a sense of boundlessness, and the color is mostly used in the art and fashion area. IKB is not just a color; it's an artistic statement, a deliberate attempt to capture and convey pure emotion and the infinite expanse of the sky and sea. It is often associated with creativity, peace, and spirituality.

The hex color #0138B3, also known as International Klein Blue, presents some accessibility challenges, particularly in web design. Due to its dark hue, it's crucial to ensure sufficient contrast when used as a background or text color. 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 #0138B3 for text on a white background may not meet these guidelines. Therefore, it's advised to pair it with lighter colors, such as white, yellow or light shades of gray for text, or use it sparingly for decorative elements. When used as a background, white or light-colored text is necessary. Tools such as contrast checkers can help assess and adjust color combinations to ensure readability for users with visual impairments, enhancing the overall user experience. It's important to also consider the context and audience when evaluating the accessibility of this vibrant blue. Additionally, providing alternative styling options (e.g. high contrast mode) can further enhance accessibility.

Shades

Digital Color Formats

RGB
1 56 179
RGB1 56 179
Red
Green
Blue
HSL
221.46deg 98.89% 35.29%
221.4698.8935.29HSL
Hue
Saturation
Lightness
HWB
221.46deg 0.39% 29.8%
221.460.3929.8HWB
Hue
Whiteness
Blackness
hex#0138B3
rgb1 56 179
hsl221.46deg 98.89% 35.29%
cmyk99.44% 68.72% 0% 29.8%
hwb221.46deg 0.39% 29.8%
xyz-d650.1 0.06 0.43
oklch0.4072 0.2002 262.87
oklab0.4072 -0.02 -0.2
CMYK
99.44% 68.72% 0% 29.8%
99.4468.72029.8CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.1 0.06 0.43
0.10.060.43XYZ
X
Y
Z
OKLCH
0.4072 0.2002 262.87
0.40720.2002262.87LCH
Lightness
Chroma
Hue
OKLAB
0.4072 -0.02 -0.2
0.4072-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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