International Klein Blue

#031CB0

About International Klein Blue

International Klein Blue (IKB), represented by the hexadecimal color code #031CB0, is a deep blue hue renowned for its intensity and unique visual impact. This ultramarine pigment was developed by the artist Yves Klein in collaboration with a Parisian paint dealer, Édouard Adam, and the chemical formula for the color is protected by the INPI (French National Institute of Industrial Property). Klein sought to create a blue that captured the essence of the sky and the sea, evoking feelings of limitlessness and spiritual depth. Its striking saturation and matte finish distinguish it from other blues, making it a sought-after color in art, design, and fashion. The color has been trademarked, so it has a strong significance with the artist Yves Klein.

The hex color #031CB0, a deep shade of blue, presents accessibility challenges, especially concerning color contrast. When used as a foreground color, it requires a very light background to meet WCAG (Web Content Accessibility Guidelines) standards for sufficient contrast. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. If using this blue for interactive elements like buttons or links, ensure that the hover, focus, and active states also provide adequate contrast. Text size and font-weight choices also affect readability. Therefore, careful consideration should be given to pairings of this color with other elements. Consider providing alternative color themes to allow users to customize their viewing experience, which is a best practice for inclusive design.

Shades

Digital Color Formats

RGB
3 28 176
RGB3 28 176
Red
Green
Blue
HSL
231.33deg 96.65% 35.1%
231.3396.6535.1HSL
Hue
Saturation
Lightness
HWB
231.33deg 1.18% 30.98%
231.331.1830.98HWB
Hue
Whiteness
Blackness
hex#031CB0
rgb3 28 176
hsl231.33deg 96.65% 35.1%
cmyk98.3% 84.09% 0% 30.98%
hwb231.33deg 1.18% 30.98%
xyz-d650.08 0.04 0.41
oklch0.3633 0.223 264.59
oklab0.3633 -0.02 -0.22
CMYK
98.3% 84.09% 0% 30.98%
98.384.09030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.04 0.41
0.080.040.41XYZ
X
Y
Z
OKLCH
0.3633 0.223 264.59
0.36330.223264.59LCH
Lightness
Chroma
Hue
OKLAB
0.3633 -0.02 -0.22
0.3633-0.02-0.22LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons