International Klein Blue

#0521C5

About International Klein Blue

International Klein Blue, also known as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein was fascinated by the color blue, seeing it as embodying pure idea of the sky, sea, and limitlessness. He collaborated with a Parisian paint supplier to develop a unique matte version of ultramarine, which he then patented in 1957. IKB is known for its intensity and visual impact. It is often used in modern art and design to evoke feelings of spirituality, depth, and the infinite. Because of its depth, one of the challenges of using this color for web design is to create an interface that balances the visual impact with good legibility and a positive user experience.

The hex color #0521c5, a deep, vibrant blue, presents certain accessibility challenges, especially concerning color contrast. When used as a background, it necessitates very light text colors like white or very pale yellow to meet WCAG (Web Content Accessibility Guidelines) standards for readability. The contrast ratio between #0521c5 and black is insufficient, making it unsuitable for text. It's crucial to test color combinations using accessibility tools to ensure compliance. When using this color for interactive elements, provide clear visual cues beyond color alone, such as underlines or icons, to assist users with visual impairments. Consider offering a high-contrast theme option for users who need it. Remember that proper planning enhances the experience for all users, regardless of their abilities.

Shades

Digital Color Formats

RGB
5 33 197
RGB5 33 197
Red
Green
Blue
HSL
231.25deg 95.05% 39.61%
231.2595.0539.61HSL
Hue
Saturation
Lightness
HWB
231.25deg 1.96% 22.75%
231.251.9622.75HWB
Hue
Whiteness
Blackness
hex#0521C5
rgb5 33 197
hsl231.25deg 95.05% 39.61%
cmyk97.46% 83.25% 0% 22.75%
hwb231.25deg 1.96% 22.75%
xyz-d650.11 0.05 0.53
oklch0.3956 0.2421 264.7
oklab0.3956 -0.02 -0.24
CMYK
97.46% 83.25% 0% 22.75%
97.4683.25022.75CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.11 0.05 0.53
0.110.050.53XYZ
X
Y
Z
OKLCH
0.3956 0.2421 264.7
0.39560.2421264.7LCH
Lightness
Chroma
Hue
OKLAB
0.3956 -0.02 -0.24
0.3956-0.02-0.24LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons