International Klein Blue

#002BB3

About International Klein Blue

International Klein Blue (IKB), with the hex code #002BB3, is a deep blue hue first synthesized by the French artist Yves Klein. Klein patented this specific shade to ensure its unique identity within the art world. The color is characterized by its intense saturation and ultramarine undertones, giving it a vibrant and almost ethereal quality. It is created through a meticulous process that involves suspending pure color pigment in a synthetic resin, allowing the pigment to retain its brilliance. As a pure color with a strong emotional resonance, it is often associated with feelings of depth, expansiveness, and spiritual connection. It is distinct from other blue shades due to its extraordinary intensity and the specific chemical formulation that gives it its particular character.

The hex color #002BB3, also known as International Klein Blue, presents significant accessibility challenges, primarily due to its low luminance value. When used as a foreground color, it requires a very light background to achieve sufficient contrast for readability, especially for users with visual impairments. According to WCAG guidelines, the contrast ratio between text and background should be at least 4.5:1 for normal text and 3:1 for large text to meet AA compliance. Given the darkness of #002BB3, careful consideration is needed to ensure that any text displayed on a background of this color meets these requirements. Additionally, avoid using this color for crucial interactive elements without sufficient contrast, as it may render them invisible or difficult to perceive for some users. It's generally advisable to perform thorough accessibility testing with color contrast tools to validate that the chosen color combination meets accessibility standards.

Shades

Digital Color Formats

RGB
0 43 179
RGB0 43 179
Red
Green
Blue
HSL
225.59deg 100% 35.1%
225.5910035.1HSL
Hue
Saturation
Lightness
HWB
225.59deg 0% 29.8%
225.59029.8HWB
Hue
Whiteness
Blackness
hex#002BB3
rgb0 43 179
hsl225.59deg 100% 35.1%
cmyk100% 75.98% 0% 29.8%
hwb225.59deg 0% 29.8%
xyz-d650.09 0.05 0.43
oklch0.3858 0.214 263.79
oklab0.3858 -0.02 -0.21
CMYK
100% 75.98% 0% 29.8%
10075.98029.8CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.05 0.43
0.090.050.43XYZ
X
Y
Z
OKLCH
0.3858 0.214 263.79
0.38580.214263.79LCH
Lightness
Chroma
Hue
OKLAB
0.3858 -0.02 -0.21
0.3858-0.02-0.21LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons