International Klein Blue

#0423B0

About International Klein Blue

International Klein Blue, with the hex code #0423B0, is a deep, vibrant, and almost electric shade of blue. It is named after the French artist Yves Klein, who registered this particular shade as a trademark. The pigment's intensity is achieved through its unique composition, which typically involves a synthetic ultramarine pigment suspended in a clear, matte synthetic resin. The color is known for its high saturation and ability to evoke feelings of depth and infinity. In the RGB color model, it consists of 1.6% red, 13.7% green, and 69% blue. The specific blend of ultramarine and resin allows the color to retain its brightness and impact, capturing the viewer's attention and creating a strong visual impression. It is often associated with art and creativity due to its strong connection with Yves Klein's artistic expression.

The hex color #0423B0, a deep and saturated blue, presents significant accessibility challenges, particularly regarding color contrast. When used as a background, it necessitates very light text (white or near-white) to ensure readability. The contrast ratio must meet WCAG (Web Content Accessibility Guidelines) standards, specifically a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. It's crucial to avoid pairing this color with mid-tone colors, as the resulting low contrast will make the content difficult to perceive for users with visual impairments, including those with low vision or color blindness. Careful consideration is required when using this color for interactive elements like buttons and links, as sufficient visual cues beyond color alone are needed to indicate their interactive nature. Providing alternative styling options, such as high-contrast themes, can significantly improve accessibility.

Shades

Digital Color Formats

RGB
4 35 176
RGB4 35 176
Red
Green
Blue
HSL
229.19 95.56% 35.29%
229.1995.5635.29HSL
Hue
Saturation
Lightness
HWB
229.19 1.57% 30.98%
229.191.5730.98HWB
Hue
Whiteness
Blackness
hex#0423B0
rgb4 35 176
hsl229.19 95.56% 35.29%
cmyk97.73% 80.11% 0% 30.98%
hwb229.19 1.57% 30.98%
xyz8.49 4.36 41.47
CMYK
97.73% 80.11% 0% 30.98%
97.7380.11030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.49 4.36 41.47
8.494.3641.47XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

HexColo.rs © 2025