International Klein Blue

#021BB2

About International Klein Blue

International Klein Blue, represented by the hexadecimal color code #021BB2, is a deep, intense blue hue renowned for its vibrancy and association with the artist Yves Klein, who registered the color in 1957. This ultramarine pigment boasts a unique matte finish, enhancing its visual impact. The color's captivating depth is attributed to its high saturation and minimal reflectance. In the RGB color model, #021BB2 comprises 0.8% red, 10.6% green, and 69.8% blue. Its distinctive spectral properties position it within the deep blue range, evoking feelings of creativity, depth, and transcendence. The color is often used to evoke a sense of depth and intensity.

The color #021BB2, a deep, saturated blue, presents significant accessibility challenges, primarily due to its low luminance. When used as a foreground color, it requires very light background colors to ensure sufficient contrast for readability, especially for users with visual impairments. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text, as per WCAG guidelines. If the background is dark, the text will become unreadable. Using this blue for interactive elements necessitates clear visual cues beyond color alone, such as underlines for links or distinct shapes for buttons. Testing with accessibility tools is crucial to validate the color's usability across different user needs and devices. Considering alternative, lighter shades of blue or pairing it with high-contrast colors is essential for inclusive design.

Shades

Digital Color Formats

RGB
2 27 178
RGB2 27 178
Red
Green
Blue
HSL
231.48 97.78% 35.29%
231.4897.7835.29HSL
Hue
Saturation
Lightness
HWB
231.48 0.78% 30.2%
231.480.7830.2HWB
Hue
Whiteness
Blackness
hex#021BB2
rgb2 27 178
hsl231.48 97.78% 35.29%
cmyk98.88% 84.83% 0% 30.2%
hwb231.48 0.78% 30.2%
xyz8.45 4.01 42.45
CMYK
98.88% 84.83% 0% 30.2%
98.8884.83030.2CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.45 4.01 42.45
8.454.0142.45XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

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