International Klein Blue

#0613B1

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, as well as Klein's artistic use of this particular pigment. The synthesis of IKB occurred in 1956, and Klein subsequently patented this paint in 1967. This specific shade of blue possesses a remarkable intensity and depth, making it instantly recognizable. It's achieved by suspending pure ultramarine pigment in a clear, synthetic resin, which allows the pigment to retain its brilliance and luminosity. The color has become synonymous with Klein's artistic exploration of immateriality and the infinite. This color is a very specific tone and cannot be easily replicated.

The hex color #0613B1, also known as International Klein Blue, presents significant accessibility challenges, particularly in web design. Its extremely dark hue results in very low contrast when paired with lighter text colors like white or pale yellow. According to WCAG (Web Content Accessibility Guidelines), sufficient contrast is crucial for readability, especially for users with visual impairments. To ensure accessibility, designers should avoid using #0613B1 as a background color with light text unless the text is significantly large and bold. Consider alternative, lighter shades or use a much darker text color to meet contrast ratio requirements. Testing with accessibility tools is highly recommended to validate compliance. Using color combinations that fail accessibility standards can exclude users and create a frustrating experience. Thoughtful color selection is vital for inclusive design.

Shades

Digital Color Formats

RGB
6 19 177
RGB6 19 177
Red
Green
Blue
HSL
235.44deg 93.44% 35.88%
235.4493.4435.88HSL
Hue
Saturation
Lightness
HWB
235.44deg 2.35% 30.59%
235.442.3530.59HWB
Hue
Whiteness
Blackness
hex#0613B1
rgb6 19 177
hsl235.44deg 93.44% 35.88%
cmyk96.61% 89.27% 0% 30.59%
hwb235.44deg 2.35% 30.59%
xyz-d650.08 0.04 0.42
oklch0.3567 0.2293 265.05
oklab0.3567 -0.02 -0.23
CMYK
96.61% 89.27% 0% 30.59%
96.6189.27030.59CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.04 0.42
0.080.040.42XYZ
X
Y
Z
OKLCH
0.3567 0.2293 265.05
0.35670.2293265.05LCH
Lightness
Chroma
Hue
OKLAB
0.3567 -0.02 -0.23
0.3567-0.02-0.23LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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