International Klein Blue

#0313B0

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 registered this color as a trademark in 1957. What sets IKB apart is its ultramarine base and its matte, synthetic resin binder, which allows the pigment to retain its brilliance and intensity. This specific combination results in a color that appears almost ethereal and boundless, characteristics that Klein sought to capture in his monochrome paintings and sculptures. The color evokes a sense of depth and infinity, contributing to the spiritual and meditative qualities often associated with Klein's work. IKB has since become an iconic color in the art world and beyond, representing innovation, creativity, and a unique artistic vision.

The hex color #0313B0, also known as International Klein Blue, presents accessibility challenges due to its deep, saturated nature. When used as a foreground color, it requires careful consideration of contrast ratios against background colors to ensure readability, particularly for users with visual impairments. According to WCAG guidelines, sufficient contrast is crucial for text and interactive elements. A light background is highly recommended to achieve a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Avoid pairing this color with dark backgrounds or colors of similar luminance, as this can cause eye strain and make it difficult for users to distinguish content. Providing alternative high-contrast themes is a good practice to accommodate users with different visual needs. Moreover, avoid using color alone to convey important information; always include text labels or other visual cues to ensure inclusivity.

Shades

Digital Color Formats

RGB
3 19 176
RGB3 19 176
Red
Green
Blue
HSL
234.45deg 96.65% 35.1%
234.4596.6535.1HSL
Hue
Saturation
Lightness
HWB
234.45deg 1.18% 30.98%
234.451.1830.98HWB
Hue
Whiteness
Blackness
hex#0313B0
rgb3 19 176
hsl234.45deg 96.65% 35.1%
cmyk98.3% 89.2% 0% 30.98%
hwb234.45deg 1.18% 30.98%
xyz-d650.08 0.04 0.41
oklch0.3547 0.2288 264.64
oklab0.3547 -0.02 -0.23
CMYK
98.3% 89.2% 0% 30.98%
98.389.2030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.08 0.04 0.41
0.080.040.41XYZ
X
Y
Z
OKLCH
0.3547 0.2288 264.64
0.35470.2288264.64LCH
Lightness
Chroma
Hue
OKLAB
0.3547 -0.02 -0.23
0.3547-0.02-0.23LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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