International Klein Blue

#0031B4

About International Klein Blue

International Klein Blue, often referred to as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein sought to create a blue as pure and intense as possible, reminiscent of the skies he saw in his youth. The color was officially patented as International Klein Blue in 1957. It is created using a matte synthetic resin binder that allows the pigment to retain its brilliance and intensity. IKB is not just a color; it's a statement, an artistic declaration, and a representation of the infinite. Because of its uniqueness it has been extensively used in art and design projects.

The hex color #0031B4, also known as International Klein Blue, presents some accessibility challenges. Its dark hue results in a low contrast ratio when paired with lighter colors, potentially making text difficult to read for users with visual impairments. To ensure accessibility, it's crucial to use a high contrast ratio, ideally 4.5:1 for normal text and 3:1 for large text, as defined by WCAG guidelines. When using #0031B4 as a background, opting for white or very light yellow text can improve readability. Avoid pairing it with similar dark colors, as this will severely reduce contrast. Tools like contrast checkers can assist in verifying compliance with accessibility standards, ensuring content is perceivable and usable for everyone.

Shades

Digital Color Formats

RGB
0 49 180
RGB0 49 180
Red
Green
Blue
HSL
223.67 100% 35.29%
223.6710035.29HSL
Hue
Saturation
Lightness
HWB
223.67 0% 29.41%
223.67029.41HWB
Hue
Whiteness
Blackness
hex#0031B4
rgb0 49 180
hsl223.67 100% 35.29%
cmyk100% 72.78% 0% 29.41%
hwb223.67 0% 29.41%
xyz9.34 5.49 43.75
CMYK
100% 72.78% 0% 29.41%
10072.78029.41CMYK
Cyan
Magenta
Yellow
Key
XYZ
9.34 5.49 43.75
9.345.4943.75XYZ
X
Y
Z

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