International Klein Blue

#0726AD

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, a pure, highly saturated pigment derived from lapis lazuli. The color's intense purity and vibrancy set it apart, conveying a sense of depth and boundless space. Klein saw this specific blue as representing the cosmos, embodying a freedom from worldly constraints. He registered IKB as a trademark to maintain its unique identity and ensure that it would always be associated with his artistic vision. As a deep, intense, and matte color, it offers a unique sensory experience, inviting the viewer to explore its almost infinite depth.

The color #0726AD, also known as International Klein Blue, presents significant accessibility challenges, particularly regarding contrast. When used as a background, it requires very light text (ideally white or a very pale yellow) to ensure readability. Standard black text is almost impossible to read against this deep blue. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Given the low luminance of #0726AD, achieving sufficient contrast can be difficult with many common text colors. Web developers should carefully evaluate color combinations using contrast checking tools to ensure compliance. Also avoid using this color for crucial interface elements, unless paired with high contrasting colors. When incorporating this color in visual elements, provide alternative cues (shapes, patterns) to communicate the same information.

Shades

Digital Color Formats

RGB
7 38 173
RGB7 38 173
Red
Green
Blue
HSL
228.8 92.22% 35.29%
228.892.2235.29HSL
Hue
Saturation
Lightness
HWB
228.8 2.75% 32.16%
228.82.7532.16HWB
Hue
Whiteness
Blackness
hex#0726AD
rgb7 38 173
hsl228.8 92.22% 35.29%
cmyk95.95% 78.03% 0% 32.16%
hwb228.8 2.75% 32.16%
xyz8.32 4.45 39.96
CMYK
95.95% 78.03% 0% 32.16%
95.9578.03032.16CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.32 4.45 39.96
8.324.4539.96XYZ
X
Y
Z

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