International Klein Blue

#0020C0

About International Klein Blue

The hex color #0020C0, also known as International Klein Blue (IKB), is a deep and saturated shade of blue. It was developed by the French artist Yves Klein in collaboration with a Parisian paint dealer, Edouard Adam, specifically for Klein's use in his monochrome paintings. The color is renowned for its striking intensity and was officially patented by Klein in 1957. Chemically, IKB is a synthetic ultramarine pigment, which contributes to its unique brightness and matte finish. In the RGB color model, #0020C0 is composed of 0% red, 12.5% green, and 75.3% blue. Its visual impact stems from the strong dominance of the blue component, creating a visually arresting and memorable hue.

The hex color #0020c0, a deep and vibrant blue often associated with International Klein Blue, presents some accessibility challenges, particularly concerning color contrast. When used as a background color, it necessitates very light text (white or near-white) to ensure sufficient contrast for readability, ideally achieving a contrast ratio of at least 4.5:1 as recommended by WCAG guidelines for normal-sized text. If used for text itself, the background needs to be equally light. Due to its high saturation and relatively low lightness, it's generally not suitable for large blocks of text. When using this color for interactive elements like buttons or links, ensure there's a clear visual cue beyond color alone, such as an underline or a distinct shape change on hover, to support users with color vision deficiencies. Careful consideration is needed to meet accessibility standards and provide a positive user experience for everyone.

Shades

Digital Color Formats

RGB
0 32 192
RGB0 32 192
Red
Green
Blue
HSL
230 100% 37.65%
23010037.65HSL
Hue
Saturation
Lightness
HWB
230 0% 24.71%
230024.71HWB
Hue
Whiteness
Blackness
hex#0020C0
rgb0 32 192
hsl230 100% 37.65%
cmyk100% 83.33% 0% 24.71%
hwb230 0% 24.71%
xyz-d650.1 0.05 0.5
oklch0.3874 0.2381 264.19
oklab0.3874 -0.02 -0.24
CMYK
100% 83.33% 0% 24.71%
10083.33024.71CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.1 0.05 0.5
0.10.050.5XYZ
X
Y
Z
OKLCH
0.3874 0.2381 264.19
0.38740.2381264.19LCH
Lightness
Chroma
Hue
OKLAB
0.3874 -0.02 -0.24
0.3874-0.02-0.24LAB
Lightness
Green–Red
Blue–Yellow

Alternative colors

Applications

Complementary color

Buttons