International Klein Blue

#0621B7

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 makes IKB so distinctive is its remarkable purity and intensity. Klein aimed to achieve the purest expression of blue possible, believing that this color had a unique ability to convey emotions and spiritual depth. The visual impact of IKB stems not only from its color, but also from the matte, velvety texture of the paint Klein used, which enhances the color's intensity by maximizing light diffusion. Its use became synonymous with Klein's artistic identity.

The hex color #0621B7, also known as International Klein Blue, presents some accessibility challenges. Its dark hue provides good contrast against white text, but might pose issues with smaller text sizes or when paired with similarly dark colors. When using this color for backgrounds, ensure a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text, as recommended by WCAG guidelines. Consider providing sufficient spacing around elements using this color to improve readability and reduce eye strain. Also, be cautious when using it for interactive elements, ensuring that hover and focus states are clearly distinguishable to aid users with visual impairments. Use color contrast tools to verify compliance with accessibility standards.

Shades

Digital Color Formats

RGB
6 33 183
RGB6 33 183
Red
Green
Blue
HSL
230.85deg 93.65% 37.06%
230.8593.6537.06HSL
Hue
Saturation
Lightness
HWB
230.85deg 2.35% 28.24%
230.852.3528.24HWB
Hue
Whiteness
Blackness
hex#0621B7
rgb6 33 183
hsl230.85deg 93.65% 37.06%
cmyk96.72% 81.97% 0% 28.24%
hwb230.85deg 2.35% 28.24%
xyz-d650.09 0.05 0.45
oklch0.3784 0.2265 264.86
oklab0.3784 -0.02 -0.23
CMYK
96.72% 81.97% 0% 28.24%
96.7281.97028.24CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.45
0.090.050.45XYZ
X
Y
Z
OKLCH
0.3784 0.2265 264.86
0.37840.2265264.86LCH
Lightness
Chroma
Hue
OKLAB
0.3784 -0.02 -0.23
0.3784-0.02-0.23LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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