International Klein Blue

#001C9C

About International Klein Blue

International Klein Blue, often referred to as IKB, is a deep blue hue first mixed by the French artist Yves Klein. It's renowned for its vividness and matte finish, achieved by suspending pure color pigment in a synthetic resin. Klein registered this color as a trademark in France, cementing its status as a unique and iconic shade. The color's intensity is partly due to its lack of reflective qualities, which allows the viewer to fully absorb the pigment's depth. This characteristic has made it a popular choice in art, fashion, and design, symbolizing creativity and innovation. The distinctive saturation and depth of IKB makes it different from other blue tones.

International Klein Blue (#001C9C) presents some accessibility challenges, especially when used as text on a white background. Its low lightness value results in a weak contrast ratio, potentially failing WCAG standards for text legibility. To enhance accessibility, consider using it for larger graphical elements or pairing it with significantly lighter colors like white or very light grays for text. Conversely, avoid using it as a background color for dark text. Providing sufficient contrast ensures that users with visual impairments can easily perceive the information. Tools such as contrast checkers can help determine appropriate color pairings. For optimal accessibility, it is recommended to adhere to a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text, according to WCAG guidelines. Exploring alternative color combinations or using the color sparingly in designs can help mitigate accessibility concerns.

Shades

Digital Color Formats

RGB
0 28 156
RGB0 28 156
Red
Green
Blue
HSL
229.23deg 100% 30.59%
229.2310030.59HSL
Hue
Saturation
Lightness
HWB
229.23deg 0% 38.82%
229.23038.82HWB
Hue
Whiteness
Blackness
hex#001C9C
rgb0 28 156
hsl229.23deg 100% 30.59%
cmyk100% 82.05% 0% 38.82%
hwb229.23deg 0% 38.82%
xyz-d650.06 0.03 0.32
oklch0.3371 0.2009 264.12
oklab0.3371 -0.02 -0.2
CMYK
100% 82.05% 0% 38.82%
10082.05038.82CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.06 0.03 0.32
0.060.030.32XYZ
X
Y
Z
OKLCH
0.3371 0.2009 264.12
0.33710.2009264.12LCH
Lightness
Chroma
Hue
OKLAB
0.3371 -0.02 -0.2
0.3371-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons