International Klein Blue

#0225B2

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, as well as Klein's artistic use of this particular color. The synthesis of IKB has been patented by Yves Klein. It is a specific shade of blue achieved by mixing pure ultramarine pigment with a synthetic resin binder, which allows the pigment to maintain its intensity and vibrancy. Klein used this color extensively in his monochrome paintings and sculptures, seeking to evoke a sense of boundlessness and spirituality. The color has since become iconic and is often associated with creativity, innovation, and a sense of the infinite.

The hex color #0225B2, also known as International Klein Blue, presents some accessibility challenges, especially concerning text legibility. When used as a background color, it necessitates light-colored text to ensure sufficient contrast. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. This vibrant blue may not automatically meet these criteria with darker text options. Therefore, careful consideration and testing with accessibility tools are crucial. Designers and developers must verify that the chosen text color provides adequate contrast for users with visual impairments. Furthermore, avoid using this color as the sole means of conveying information, as users with color blindness may not perceive it accurately. Providing alternative cues, such as text labels or icons, is essential for inclusive design.

Shades

Digital Color Formats

RGB
2 37 178
RGB2 37 178
Red
Green
Blue
HSL
228.07 97.78% 35.29%
228.0797.7835.29HSL
Hue
Saturation
Lightness
HWB
228.07 0.78% 30.2%
228.070.7830.2HWB
Hue
Whiteness
Blackness
hex#0225B2
rgb2 37 178
hsl228.07 97.78% 35.29%
cmyk98.88% 79.21% 0% 30.2%
hwb228.07 0.78% 30.2%
xyz8.72 4.55 42.54
CMYK
98.88% 79.21% 0% 30.2%
98.8879.21030.2CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.72 4.55 42.54
8.724.5542.54XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

HexColo.rs © 2025