International Klein Blue

#0939AB

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. IKB's visual impact comes from its heavy reliance on ultramarine pigment and a matte, synthetic resin binder, which allows the color to achieve its maximum saturation and intensity. Yves Klein registered this color as a trademark in 1957, although the patent is related to the process of creating the paint, not the color itself. The color is intended to convey Klein's concept of the void, which he sought to represent through pure color devoid of form or content. It has been featured in many modern art installations and is still well known for its distinctive blue hue.

The color #0939ab, or International Klein Blue (IKB), presents significant accessibility challenges. Its dark hue on its own may provide sufficient contrast on a white background. However, when combined with other dark colors or used for text, it can become difficult for users with visual impairments to read. The contrast ratio must be carefully evaluated against WCAG guidelines to ensure readability. Using this color for interactive elements like buttons or links requires extra attention. Providing sufficient visual cues beyond color, such as underlines or icons, is crucial. It is also recommended to offer a high-contrast theme option for users who need it. Screen reader compatibility is generally not an issue for solid colors, but proper semantic HTML should always be used to provide context to assistive technologies. Thorough testing with accessibility tools and real users with disabilities is essential to ensure inclusive design when using IKB.

Shades

Digital Color Formats

RGB
9 57 171
RGB9 57 171
Red
Green
Blue
HSL
222.22deg 90% 35.29%
222.229035.29HSL
Hue
Saturation
Lightness
HWB
222.22deg 3.53% 32.94%
222.223.5332.94HWB
Hue
Whiteness
Blackness
hex#0939AB
rgb9 57 171
hsl222.22deg 90% 35.29%
cmyk94.74% 66.67% 0% 32.94%
hwb222.22deg 3.53% 32.94%
xyz-d650.09 0.06 0.39
oklch0.4021 0.1879 263.27
oklab0.4021 -0.02 -0.19
CMYK
94.74% 66.67% 0% 32.94%
94.7466.67032.94CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.39
0.090.060.39XYZ
X
Y
Z
OKLCH
0.4021 0.1879 263.27
0.40210.1879263.27LCH
Lightness
Chroma
Hue
OKLAB
0.4021 -0.02 -0.19
0.4021-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons