International Klein Blue

#0B2BA9

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. IKB's visual impact comes from its heavy reliance on ultramarine pigment, as well as Klein's artistic vision. This particular shade of blue is highly saturated and has a unique quality that sets it apart from other blues. It is a registered trademark and is renowned for its intense and pure chromatic presence. The color is achieved by suspending a dry ultramarine pigment in a clear synthetic resin, which allows the pigment to maintain its brilliance and intensity. Because of its captivating effect it has been widely adopted in art, design, and fashion.

The color #0B2BA9, also known as International Klein Blue, presents several accessibility considerations for web development. Its dark hue provides a strong visual contrast against lighter backgrounds, enhancing readability for users with visual impairments. However, when paired with darker backgrounds, the contrast may be insufficient, making text and interactive elements difficult to discern. Adhering to WCAG guidelines for color contrast ratios is crucial. For standard text (size 14), a contrast ratio of at least 4.5:1 against the background is recommended, while for larger text (size 18) or graphics, a ratio of 3:1 is sufficient. Testing color combinations with accessibility tools is advisable to ensure compliance and optimal user experience for all individuals, including those with color vision deficiencies.

Shades

Digital Color Formats

RGB
11 43 169
RGB11 43 169
Red
Green
Blue
HSL
227.85deg 87.78% 35.29%
227.8587.7835.29HSL
Hue
Saturation
Lightness
HWB
227.85deg 4.31% 33.73%
227.854.3133.73HWB
Hue
Whiteness
Blackness
hex#0B2BA9
rgb11 43 169
hsl227.85deg 87.78% 35.29%
cmyk93.49% 74.56% 0% 33.73%
hwb227.85deg 4.31% 33.73%
xyz-d650.08 0.05 0.38
oklch0.3764 0.2005 264.99
oklab0.3764 -0.02 -0.2
CMYK
93.49% 74.56% 0% 33.73%
93.4974.56033.73CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.05 0.38
0.080.050.38XYZ
X
Y
Z
OKLCH
0.3764 0.2005 264.99
0.37640.2005264.99LCH
Lightness
Chroma
Hue
OKLAB
0.3764 -0.02 -0.2
0.3764-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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