International Klein Blue

#0738AD

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein registered this color as a trademark in 1957. What makes IKB unique is its high saturation and matte finish, which gives the color an exceptional luminosity and depth. The color is achieved through a specific formulation involving a synthetic ultramarine pigment suspended in a polyvinyl acetate binder. IKB is highly valued in art, design, and fashion for its ability to evoke feelings of spirituality, depth, and infinity. Its distinctive qualities have made it an iconic and instantly recognizable color in the world of visual culture.

The hex color #0738ad, also known as International Klein Blue, presents significant accessibility challenges, particularly in text-based contexts. Its low luminance value of approximately 6% results in extremely poor contrast against a standard white background. This fails WCAG (Web Content Accessibility Guidelines) contrast ratio requirements for both normal and large text sizes. To ensure accessibility, it's crucial to avoid using this color for text unless paired with a very light color. For example, white (#ffffff) used as background color might pass the WCAG AA level for large text but will still fail for normal-sized text. It's also important to avoid using #0738ad for critical UI elements like buttons or links without providing sufficient visual cues and contrast. Alternative color combinations or modifications to the hue, saturation, and brightness should be explored to improve readability and usability for all users, including those with visual impairments.

Shades

Digital Color Formats

RGB
7 56 173
RGB7 56 173
Red
Green
Blue
HSL
222.29deg 92.22% 35.29%
222.2992.2235.29HSL
Hue
Saturation
Lightness
HWB
222.29deg 2.75% 32.16%
222.292.7532.16HWB
Hue
Whiteness
Blackness
hex#0738AD
rgb7 56 173
hsl222.29deg 92.22% 35.29%
cmyk95.95% 67.63% 0% 32.16%
hwb222.29deg 2.75% 32.16%
xyz-d650.09 0.06 0.4
oklch0.402 0.1919 263.27
oklab0.402 -0.02 -0.19
CMYK
95.95% 67.63% 0% 32.16%
95.9567.63032.16CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.4
0.090.060.4XYZ
X
Y
Z
OKLCH
0.402 0.1919 263.27
0.4020.1919263.27LCH
Lightness
Chroma
Hue
OKLAB
0.402 -0.02 -0.19
0.402-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons