International Klein Blue

#0136B3

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. The visual impact of IKB comes from its heavy reliance on ultramarine, as well as Klein's artistic use of the color applied to monochrome canvases. The synthetic ultramarine pigment is processed and mixed with a polyvinyl acetate binder, and this allows the pigment to maintain its color characteristics and saturation as much as possible. IKB is recognized as a specific color in its own right, not just a variant of ultramarine. This color has been used and referenced in various artistic, fashion, and design contexts. Its intensity and unique history make it a memorable and influential color.

The hex color #0136B3, a deep, vibrant blue, presents significant accessibility challenges in web design. Its low lightness value means that it offers insufficient contrast when paired with light text or backgrounds. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text to ensure readability for users with visual impairments. Using #0136B3 as a background color requires very light text, such as white or very pale yellow, to meet these standards. Without sufficient contrast, text becomes difficult to read, particularly for users with low vision or color blindness. Tools like contrast checkers can help designers evaluate the contrast ratio between text and background colors. Also, avoid using this color for essential interactive elements, as users might struggle to identify them.

Shades

Digital Color Formats

RGB
1 54 179
RGB1 54 179
Red
Green
Blue
HSL
222.13deg 98.89% 35.29%
222.1398.8935.29HSL
Hue
Saturation
Lightness
HWB
222.13deg 0.39% 29.8%
222.130.3929.8HWB
Hue
Whiteness
Blackness
hex#0136B3
rgb1 54 179
hsl222.13deg 98.89% 35.29%
cmyk99.44% 69.83% 0% 29.8%
hwb222.13deg 0.39% 29.8%
xyz-d650.09 0.06 0.43
oklch0.4037 0.2024 263.08
oklab0.4037 -0.02 -0.2
CMYK
99.44% 69.83% 0% 29.8%
99.4469.83029.8CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.43
0.090.060.43XYZ
X
Y
Z
OKLCH
0.4037 0.2024 263.08
0.40370.2024263.08LCH
Lightness
Chroma
Hue
OKLAB
0.4037 -0.02 -0.2
0.4037-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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