International Klein Blue

#0234B2

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 of blue was developed as part of Klein's artistic exploration of pure color and the infinite. He sought to capture the most intense and purest expression of blue, believing it represented the boundless nature of space and spirituality. The color was officially patented as International Klein Blue (IKB) to protect its unique formulation and ensure its association with Klein's work. It is a highly saturated, ultramarine-based pigment known for its striking visual impact. Its rich and intense hue sets it apart from other blues, making it a favorite choice for artists and designers seeking a vibrant and memorable aesthetic.

The hex color #0234B2, also known as International Klein Blue, presents some accessibility challenges, especially regarding text legibility. When using this color as a background, it is crucial to select a foreground text color with sufficient contrast. White text generally works well due to the high contrast ratio. However, lighter shades of yellow or green can also offer acceptable contrast. Avoid using dark text colors like black, gray, or even darker blues, as they will likely fail accessibility standards. Ensure a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text to meet WCAG guidelines. Tools like WebAIM's contrast checker can be used to verify compliance. Careful consideration of text size and weight can also improve readability when using this vibrant blue. Also keep in mind users with visual impairments.

Shades

Digital Color Formats

RGB
2 52 178
RGB2 52 178
Red
Green
Blue
HSL
222.95deg 97.78% 35.29%
222.9597.7835.29HSL
Hue
Saturation
Lightness
HWB
222.95deg 0.78% 30.2%
222.950.7830.2HWB
Hue
Whiteness
Blackness
hex#0234B2
rgb2 52 178
hsl222.95deg 97.78% 35.29%
cmyk98.88% 70.79% 0% 30.2%
hwb222.95deg 0.78% 30.2%
xyz-d650.09 0.06 0.43
oklch0.3993 0.2032 263.35
oklab0.3993 -0.02 -0.2
CMYK
98.88% 70.79% 0% 30.2%
98.8870.79030.2CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.43
0.090.060.43XYZ
X
Y
Z
OKLCH
0.3993 0.2032 263.35
0.39930.2032263.35LCH
Lightness
Chroma
Hue
OKLAB
0.3993 -0.02 -0.2
0.3993-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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