International Klein Blue

#0235AF

About International Klein Blue

International Klein Blue, also known as IKB, is a deep blue hue first mixed by the French artist Yves Klein. IKB's visual impact comes from its heavy reliance on ultramarine, as well as Klein's matte, synthetic resin binder, which suspends the color pigment and allows the pigment to maintain its original qualities. The color is a specific shade of blue achieved by Yves Klein through collaboration with a Parisian paint supplier, who created a custom formula. The visual effect of IKB is more than just a color; it's an experience. It evokes feelings of infinity, transcendence, and immersion. Klein famously used this color in his monochrome paintings, sculptures, and even performances. IKB has since become a cultural icon, representing creativity, innovation, and a unique artistic vision. Klein successfully patented IKB shortly after its conception.

The hex color #0235AF, also known as International Klein Blue, presents several accessibility considerations for web developers. Due to its deep and saturated nature, it's crucial to ensure sufficient contrast when used as a background or text color. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text against its background. When using #0235AF for text, pair it with light colors like #FFFFFF (white) or shades of yellow or beige to meet these contrast requirements. Avoid using it with darker colors, as this may make the text illegible for users with visual impairments. Consider providing alternative color schemes that offer higher contrast for users with specific accessibility needs. Tools like WebAIM's Contrast Checker can help verify contrast ratios. Using this intense blue sparingly can help to avoid cognitive overload on the user.

Shades

Digital Color Formats

RGB
2 53 175
RGB2 53 175
Red
Green
Blue
HSL
222.31deg 97.74% 34.71%
222.3197.7434.71HSL
Hue
Saturation
Lightness
HWB
222.31deg 0.78% 31.37%
222.310.7831.37HWB
Hue
Whiteness
Blackness
hex#0235AF
rgb2 53 175
hsl222.31deg 97.74% 34.71%
cmyk98.86% 69.71% 0% 31.37%
hwb222.31deg 0.78% 31.37%
xyz-d650.09 0.06 0.41
oklch0.3978 0.1984 263.15
oklab0.3978 -0.02 -0.2
CMYK
98.86% 69.71% 0% 31.37%
98.8669.71031.37CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.41
0.090.060.41XYZ
X
Y
Z
OKLCH
0.3978 0.1984 263.15
0.39780.1984263.15LCH
Lightness
Chroma
Hue
OKLAB
0.3978 -0.02 -0.2
0.3978-0.02-0.2LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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