International Klein Blue

#0025B4

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. This specific shade was developed as part of Klein's monochrome paintings and sculptures, and it was officially patented in 1957. IKB's unique visual impact stems from its intense saturation and matte finish, which makes it highly distinct from other blue shades. The color is achieved using a synthetic ultramarine pigment suspended in a resin binder. Known for its powerful emotional resonance, the color has been used across various fields, from art and fashion to design and branding, often to evoke feelings of depth, spirituality, and infinity.

The hex color #0025B4, also known as International Klein Blue, presents some accessibility challenges, especially in web design. Its deep, saturated hue results in low contrast with lighter colors, making text illegible for users with visual impairments. According to WCAG guidelines, sufficient contrast is essential for readability. To ensure accessibility, it's advisable to pair #0025B4 with very light shades like white (#FFFFFF) or very pale yellows. When using this color for interactive elements, provide clear visual cues and avoid relying solely on color to convey meaning. Furthermore, consider providing alternative color schemes that users can select based on their preferences to enhance overall usability.

Shades

Digital Color Formats

RGB
0 37 180
RGB0 37 180
Red
Green
Blue
HSL
227.67 100% 35.29%
227.6710035.29HSL
Hue
Saturation
Lightness
HWB
227.67 0% 29.41%
227.67029.41HWB
Hue
Whiteness
Blackness
hex#0025B4
rgb0 37 180
hsl227.67 100% 35.29%
cmyk100% 79.44% 0% 29.41%
hwb227.67 0% 29.41%
xyz8.9 4.62 43.6
CMYK
100% 79.44% 0% 29.41%
10079.44029.41CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.9 4.62 43.6
8.94.6243.6XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

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