International Klein Blue

#0030BC

About International Klein Blue

International Klein Blue (IKB) is a deep blue hue first mixed by the French artist Yves Klein. Klein registered this color as a trademark in 1957. IKB's visual impact comes from its heavy reliance on ultramarine pigment, as well as Klein's conception of the color as being 'the most perfect expression of blue.' The color's intensity and purity were crucial to Klein's artistic vision, as he sought to detach color from any representational or functional purpose. The color is achieved by suspending pure ultramarine pigment in a clear synthetic resin, which allows the pigment to maintain its original qualities and maximum saturation. IKB is strongly associated with Klein's monochromatic paintings and sculptures, becoming an iconic element of his artistic identity and philosophical concept. The color is a specific shade of blue.

The color #0030BC, also known as International Klein Blue (IKB), presents some accessibility challenges. Its low luminance value means it requires careful consideration when used as a background or text color. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is required for normal text and 3:1 for large text against a background. IKB may fail to meet these contrast ratios with light-colored text, making it difficult for users with visual impairments to read. Therefore, it's crucial to pair IKB with very light colors like white (#FFFFFF) or very light grays to ensure sufficient contrast. Tools such as contrast checkers can help determine if the color combination meets accessibility standards. Additionally, providing alternative text or visual cues can improve accessibility for users who may have difficulty perceiving the color itself. When using IKB, web developers should also consider users with color blindness and ensure that important information is not solely conveyed through color.

Shades

Digital Color Formats

RGB
0 48 188
RGB0 48 188
Red
Green
Blue
HSL
224.68deg 100% 36.86%
224.6810036.86HSL
Hue
Saturation
Lightness
HWB
224.68deg 0% 26.27%
224.68026.27HWB
Hue
Whiteness
Blackness
hex#0030BC
rgb0 48 188
hsl224.68deg 100% 36.86%
cmyk100% 74.47% 0% 26.27%
hwb224.68deg 0% 26.27%
xyz-d650.1 0.06 0.48
oklch0.4036 0.2197 263.66
oklab0.4036 -0.02 -0.22
CMYK
100% 74.47% 0% 26.27%
10074.47026.27CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.1 0.06 0.48
0.10.060.48XYZ
X
Y
Z
OKLCH
0.4036 0.2197 263.66
0.40360.2197263.66LCH
Lightness
Chroma
Hue
OKLAB
0.4036 -0.02 -0.22
0.4036-0.02-0.22LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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