International Klein Blue

#063AAE

About International Klein Blue

International Klein Blue (IKB), represented by the hexadecimal color code #063AAE, is a deep blue hue developed by the French artist Yves Klein. Klein patented this color in 1957 to maintain its unique visual impact and association with his artwork, particularly his monochrome paintings. IKB is characterized by its intense saturation and ultramarine-like appearance, achieved through a specific mixture of ultramarine pigment and a synthetic resin binder. The color is intended to evoke a sense of boundless space and spirituality, reflecting Klein's artistic philosophy. Due to its distinctive and patented nature, IKB holds a significant place in the history of art and color theory. It is often used in contexts where a strong, pure, and visually striking blue is desired, maintaining the artistic values associated with the artist.

The color #063AAE, a deep shade of blue known as International Klein Blue (IKB), presents some accessibility challenges, especially in web design. Its high intensity and relatively low lightness value mean that text rendered in this color requires careful consideration of contrast ratios. According to WCAG guidelines, sufficient contrast between text and background is crucial for readability, particularly for users with visual impairments. When using #063AAE for text, it's vital to pair it with a very light background (e.g., white or very pale yellow) to ensure a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Conversely, using #063AAE as a background color necessitates light-colored text. Tools like contrast checkers can help evaluate the contrast ratio. Moreover, avoid using this color as the sole indicator of interactive elements like links; provide additional cues such as underlines or icons. Consider users with color vision deficiencies by ensuring information is not conveyed solely through color.

Shades

Digital Color Formats

RGB
6 58 174
RGB6 58 174
Red
Green
Blue
HSL
221.43deg 93.33% 35.29%
221.4393.3335.29HSL
Hue
Saturation
Lightness
HWB
221.43deg 2.35% 31.76%
221.432.3531.76HWB
Hue
Whiteness
Blackness
hex#063AAE
rgb6 58 174
hsl221.43deg 93.33% 35.29%
cmyk96.55% 66.67% 0% 31.76%
hwb221.43deg 2.35% 31.76%
xyz-d650.09 0.06 0.41
oklch0.4065 0.191 262.94
oklab0.4065 -0.02 -0.19
CMYK
96.55% 66.67% 0% 31.76%
96.5566.67031.76CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.41
0.090.060.41XYZ
X
Y
Z
OKLCH
0.4065 0.191 262.94
0.40650.191262.94LCH
Lightness
Chroma
Hue
OKLAB
0.4065 -0.02 -0.19
0.4065-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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