International Klein Blue

#0725AD

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 sets IKB apart is its remarkable intensity and purity. Klein aimed to achieve the greatest possible impact of blue, believing it to be the most perfect expression of color. The pigment used is a synthetic ultramarine, and the unique matte finish further enhances the color's brilliance. The color is intended to evoke feelings of boundlessness, spirituality, and the infinite. It is a color that seeks to capture the essence of the immaterial, often associated with the sky and the sea.

The color #0725AD, also known as International Klein Blue, presents significant accessibility challenges, particularly for users with visual impairments. Its very low lightness value of approximately 3% means that text or interactive elements using this color as a background would require extremely light foreground colors to meet WCAG (Web Content Accessibility Guidelines) contrast requirements. A contrast ratio of at least 4.5:1 is recommended for standard text and 3:1 for large text. Therefore, careful consideration and testing with accessibility tools are crucial to ensure readability and usability. Furthermore, relying solely on color to convey information is strongly discouraged; supplementing with text labels or icons is essential for those who may not be able to distinguish the color effectively. The intense nature of this blue might also present challenges for users with photosensitivity.

Shades

Digital Color Formats

RGB
7 37 173
RGB7 37 173
Red
Green
Blue
HSL
229.16 92.22% 35.29%
229.1692.2235.29HSL
Hue
Saturation
Lightness
HWB
229.16 2.75% 32.16%
229.162.7532.16HWB
Hue
Whiteness
Blackness
hex#0725AD
rgb7 37 173
hsl229.16 92.22% 35.29%
cmyk95.95% 78.61% 0% 32.16%
hwb229.16 2.75% 32.16%
xyz8.29 4.39 39.94
CMYK
95.95% 78.61% 0% 32.16%
95.9578.61032.16CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.29 4.39 39.94
8.294.3939.94XYZ
X
Y
Z

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