International Klein Blue

#0325B0

About International Klein Blue

International Klein Blue, often abbreviated 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 artistic vision. This particular shade of blue is renowned for its intensity and depth, setting it apart from other blues. Yves Klein registered this color as a trademark in 1957, solidifying its place in art history. The color achieves its visual impact through a unique matte, powdery finish that enhances its saturation. Klein used a synthetic resin binder to suspend the pigment and maintain its vibrant quality. This historical significance and unique formulation contribute to IKB's iconic status in the art world and beyond.

The color #0325B0, also known as International Klein Blue, presents some accessibility challenges, particularly in web design. Its high saturation and relatively dark value mean that careful consideration must be given to text and interface element contrast. When using this color for backgrounds, it is crucial to ensure that any foreground text or interactive elements have a sufficient contrast ratio, ideally meeting WCAG (Web Content Accessibility Guidelines) standards for Level AA or AAA compliance. A contrast ratio of at least 4.5:1 for normal text and 3:1 for large text is recommended. Lighter text colors like white or pale yellow can be effective. Avoid pairing this color with other dark or similarly saturated colors, as this can lead to visual strain and reduced readability. Thoughtful use of color combinations and contrast adjustments are essential to make designs inclusive and accessible for users with visual impairments.

Shades

Digital Color Formats

RGB
3 37 176
RGB3 37 176
Red
Green
Blue
HSL
228.21 96.65% 35.1%
228.2196.6535.1HSL
Hue
Saturation
Lightness
HWB
228.21 1.18% 30.98%
228.211.1830.98HWB
Hue
Whiteness
Blackness
hex#0325B0
rgb3 37 176
hsl228.21 96.65% 35.1%
cmyk98.3% 78.98% 0% 30.98%
hwb228.21 1.18% 30.98%
xyz8.54 4.48 41.49
CMYK
98.3% 78.98% 0% 30.98%
98.378.98030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.54 4.48 41.49
8.544.4841.49XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

HexColo.rs © 2025