International Klein Blue

#0128A4

General Information about International Klein Blue

International Klein Blue, also known as IKB, is a deep blue hue first mixed by the French artist Yves Klein. IKB's visual impact comes from its heavy reliance on ultramarine, as well as Klein's artistic use of the color. Klein patented this color in 1957 to maintain its unique identity and association with his art. Chemically, it is a synthetic ultramarine pigment. In the RGB color model, its values are R: 1, G: 40, B: 164. In the CMYK color model, its values are C: 99, M: 76, Y: 0, K: 36. The color is perceived as stable, trustworthy and elegant. International Klein Blue stands out due to its unique vibrancy and historical significance in the art world.

The contrast ratio of #0128A4 against white is 8.36:1, which exceeds the WCAG AAA standard for text and non-text contrast. This makes it highly accessible for users with visual impairments. When used as a background color, white text is easily readable. However, when using this color for smaller elements or intricate designs, ensure sufficient contrast with surrounding colors. For users with color blindness, this blue is generally well perceived. Designers should also consider providing alternative cues, such as text labels or icons, alongside color to ensure inclusivity. Additionally, the color is distinct enough to be easily differentiated from other blues and purples, reducing potential confusion.

Shades

Digital Color Formats

RGB
1 40 164
RGB1 40 164
Red
Green
Blue
HSL
225.64deg 98.79% 32.35%
225.6498.7932.35HSL
Hue
Saturation
Lightness
HWB
225.64deg 0.39% 35.69%
225.640.3935.69HWB
Hue
Whiteness
Blackness
hex#0128A4
rgb1 40 164
hsl225.64deg 98.79% 32.35%
cmyk99.39% 75.61% 0% 35.69%
hwb225.64deg 0.39% 35.69%
xyz-d650.07 0.04 0.36
oklch0.364 0.199 263.84
oklab0.364 -0.02 -0.2
CMYK
99.39% 75.61% 0% 35.69%
99.3975.61035.69CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.07 0.04 0.36
0.070.040.36XYZ
X
Y
Z
OKLCH
0.364 0.199 263.84
0.3640.199263.84LCH
Lightness
Chroma
Hue
OKLAB
0.364 -0.02 -0.2
0.364-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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