International Klein Blue

#0417B0

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein patented this color in 1957. What sets IKB apart is its remarkable intensity and purity, achieved by suspending pure color pigment in a clear synthetic resin. This allows the pigment to maintain its brilliance without being dulled by a binder. Yves Klein used IKB in many of his monochrome paintings, sculptures, and performances, aiming to evoke a sense of boundlessness and spiritual depth. The color is intended to have a powerful impact on the viewer, symbolizing the infinite and the immaterial. Today, IKB remains a distinctive and iconic shade of blue widely recognized in the art world and beyond.

The hex color #0417B0, also known as International Klein Blue, presents significant accessibility challenges, particularly in web design. Its very low lightness value of approximately 3% means that it provides insufficient contrast with most common background colors, especially white. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is required for standard text and 3:1 for large text to ensure readability for users with visual impairments. Using #0417B0 for text on a white background, or vice versa, would fail these criteria. To improve accessibility, consider pairing this dark blue with much lighter colors such as yellows, creams, or very light grays to achieve an adequate contrast ratio. Tools like contrast checkers can help evaluate the compliance of color combinations. Also, avoid using this color alone to convey important information; supplement it with text or other visual cues.

Shades

Digital Color Formats

RGB
4 23 176
RGB4 23 176
Red
Green
Blue
HSL
233.37 95.56% 35.29%
233.3795.5635.29HSL
Hue
Saturation
Lightness
HWB
233.37 1.57% 30.98%
233.371.5730.98HWB
Hue
Whiteness
Blackness
hex#0417B0
rgb4 23 176
hsl233.37 95.56% 35.29%
cmyk97.73% 86.93% 0% 30.98%
hwb233.37 1.57% 30.98%
xyz8.19 3.77 41.37
CMYK
97.73% 86.93% 0% 30.98%
97.7386.93030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.19 3.77 41.37
8.193.7741.37XYZ
X
Y
Z

Alternative colors

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