International Klein Blue

#0011A8

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. Klein patented this color to maintain its unique identity, describing it as the purest and most perfect expression of blue. IKB is achieved using a matte, synthetic resin binder that suspends the color pigment and allows the color's intensity to remain visible. This specific ultramarine pigment is known for its vibrant and profound appearance, which Klein sought to capture in his art. The color has since become iconic and is used in various artistic and design contexts to evoke feelings of depth, infinity, and transcendence. Its rich history and unique visual properties make it a distinctive and recognizable color in the art world.

The color #0011A8, also known as International Klein Blue, presents significant accessibility challenges, particularly for users with visual impairments. Its low luminance value results in poor contrast against light backgrounds, making text or interface elements difficult to read. According to WCAG guidelines, sufficient contrast is crucial for readability and usability. To improve accessibility, it's recommended to pair this deep blue with very light colors, such as white or very pale yellow, to ensure a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Avoid using this color for critical interactive elements without careful consideration of contrast. Additionally, providing alternative text descriptions for images or icons using this color is essential for screen reader users. Ensuring that links and buttons have clear visual cues beyond just color is also important for users with color vision deficiencies.

Shades

Digital Color Formats

RGB
0 17 168
RGB0 17 168
Red
Green
Blue
HSL
233.93deg 100% 32.94%
233.9310032.94HSL
Hue
Saturation
Lightness
HWB
233.93deg 0% 34.12%
233.93034.12HWB
Hue
Whiteness
Blackness
hex#0011A8
rgb0 17 168
hsl233.93deg 100% 32.94%
cmyk100% 89.88% 0% 34.12%
hwb233.93deg 0% 34.12%
xyz-d650.07 0.03 0.37
oklch0.3415 0.2219 264.22
oklab0.3415 -0.02 -0.22
CMYK
100% 89.88% 0% 34.12%
10089.88034.12CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.07 0.03 0.37
0.070.030.37XYZ
X
Y
Z
OKLCH
0.3415 0.2219 264.22
0.34150.2219264.22LCH
Lightness
Chroma
Hue
OKLAB
0.3415 -0.02 -0.22
0.3415-0.02-0.22LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons