International Klein Blue

#0028A8

About International Klein Blue

International Klein Blue, also known as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein patented this color to maintain its uniqueness and association with his artistic creations. It is defined by its rich, ultramarine-like intensity and its matte finish, which enhances its visual impact. Chemically, IKB is a synthetic ultramarine pigment, known for its strong lightfastness and stability. In the RGB color model, IKB approximates to (0, 40, 168), signifying the near absence of red and a strong presence of blue. It is widely associated with creativity, depth, and infinity.

International Klein Blue (#0028A8) offers moderate contrast against white text, making it usable but not ideal for all users, particularly those with visual impairments. A contrast ratio of at least 4.5:1 is recommended by WCAG guidelines for normal-sized text, and a ratio of 3:1 for large text (14pt bold or 18pt). When used as a background, consider using light shades of yellow or white for text to ensure readability. It's crucial to test color combinations with accessibility evaluation tools to meet compliance standards and create an inclusive user experience. Remember, perceived contrast can vary slightly between displays, so always test on different devices. Additionally, avoid using color as the sole method to convey information; always use text labels or other visual cues.

Shades

Digital Color Formats

RGB
0 40 168
RGB0 40 168
Red
Green
Blue
HSL
225.71deg 100% 32.94%
225.7110032.94HSL
Hue
Saturation
Lightness
HWB
225.71deg 0% 34.12%
225.71034.12HWB
Hue
Whiteness
Blackness
hex#0028A8
rgb0 40 168
hsl225.71deg 100% 32.94%
cmyk100% 76.19% 0% 34.12%
hwb225.71deg 0% 34.12%
xyz-d650.08 0.04 0.37
oklch0.3684 0.204 263.77
oklab0.3684 -0.02 -0.2
CMYK
100% 76.19% 0% 34.12%
10076.19034.12CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.04 0.37
0.080.040.37XYZ
X
Y
Z
OKLCH
0.3684 0.204 263.77
0.36840.204263.77LCH
Lightness
Chroma
Hue
OKLAB
0.3684 -0.02 -0.2
0.3684-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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