International Klein Blue

#0438B0

About International Klein Blue

International Klein Blue, with the hex code #0438B0, is a deep, saturated shade of blue known for its unique intensity and visual impact. It was developed by the French artist Yves Klein in collaboration with a Parisian paint supplier, who patented the color in 1956. Klein sought to create a blue that conveyed a sense of boundlessness and transcendence, believing it captured the essence of the sky and the sea. The color is achieved through the addition of a synthetic ultramarine pigment to a resin binder, which preserves the pigment's original intensity. International Klein Blue has since become a prominent color in art, fashion, and design, symbolizing innovation and creative expression.

The color #0438B0, also known as International Klein Blue, presents significant accessibility challenges, particularly for users with visual impairments. Its low luminance value of approximately 3 results in a very low contrast ratio against a white background. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is required for normal text and 3:1 for large text to meet Level AA compliance. This color fails to meet these standards, making text illegible for many users. To improve accessibility, it is essential to use a lighter color for the text or a darker color for the background. Careful consideration of color contrast is crucial for ensuring inclusive web design, accommodating users with diverse visual abilities and adhering to accessibility standards.

Shades

Digital Color Formats

RGB
4 56 176
RGB4 56 176
Red
Green
Blue
HSL
221.86deg 95.56% 35.29%
221.8695.5635.29HSL
Hue
Saturation
Lightness
HWB
221.86deg 1.57% 30.98%
221.861.5730.98HWB
Hue
Whiteness
Blackness
hex#0438B0
rgb4 56 176
hsl221.86deg 95.56% 35.29%
cmyk97.73% 68.18% 0% 30.98%
hwb221.86deg 1.57% 30.98%
xyz-d650.09 0.06 0.42
oklch0.4045 0.196 263.07
oklab0.4045 -0.02 -0.19
CMYK
97.73% 68.18% 0% 30.98%
97.7368.18030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.09 0.06 0.42
0.090.060.42XYZ
X
Y
Z
OKLCH
0.4045 0.196 263.07
0.40450.196263.07LCH
Lightness
Chroma
Hue
OKLAB
0.4045 -0.02 -0.19
0.4045-0.02-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons