International Klein Blue

#0723C3

About International Klein Blue

International Klein Blue (IKB), also known as #0723c3, is a deep blue hue first mixed by the French artist Yves Klein. Klein patented this color to ensure its unique representation and use in his art. IKB's distinctive quality comes from its ultramarine pigment, which gives it an intense, almost velvet-like appearance. It's a pure, vibrant blue that stands out due to its high saturation and depth. Klein believed that this particular blue could best convey his concept of the infinite and immaterial. The color has since become iconic and is often associated with modernity, innovation, and artistic expression. Its unique history and visual impact have cemented its place in art, design, and popular culture.

The hex color #0723c3, also known as International Klein Blue, presents significant accessibility challenges. Its extremely dark hue results in very low contrast against typical light backgrounds, such as white (#ffffff). This fails to meet WCAG (Web Content Accessibility Guidelines) standards for color contrast, particularly for Level AA and AAA compliance. Specifically, the contrast ratio is far below the required 4.5:1 for normal text and 3:1 for large text. Using this color for text on a white background would make the content difficult or impossible to read for users with visual impairments, including those with low vision or color blindness. To improve accessibility, it's crucial to pair #0723c3 with a much lighter color for text or interface elements, or to use it sparingly for decorative purposes where readability is not critical. A thorough contrast check using online tools is highly recommended before deploying this color in any user interface.

Shades

Digital Color Formats

RGB
7 35 195
RGB7 35 195
Red
Green
Blue
HSL
231.06deg 93.07% 39.61%
231.0693.0739.61HSL
Hue
Saturation
Lightness
HWB
231.06deg 2.75% 23.53%
231.062.7523.53HWB
Hue
Whiteness
Blackness
hex#0723C3
rgb7 35 195
hsl231.06deg 93.07% 39.61%
cmyk96.41% 82.05% 0% 23.53%
hwb231.06deg 2.75% 23.53%
xyz-d650.11 0.05 0.52
oklch0.3957 0.2382 264.88
oklab0.3957 -0.02 -0.24
CMYK
96.41% 82.05% 0% 23.53%
96.4182.05023.53CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.11 0.05 0.52
0.110.050.52XYZ
X
Y
Z
OKLCH
0.3957 0.2382 264.88
0.39570.2382264.88LCH
Lightness
Chroma
Hue
OKLAB
0.3957 -0.02 -0.24
0.3957-0.02-0.24LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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