International Klein Blue

#0623C4

General Information about International Klein Blue

International Klein Blue, represented by the hex code #0623c4, is a deep blue hue first created by the French artist Yves Klein. Klein worked with a chemist to develop a unique matte version of ultramarine that maintained its brilliance when suspended in a synthetic resin. This particular shade of blue is renowned for its intensity and depth, evoking feelings of infinity and boundlessness. It's created to remind of the color lapis lazuli. The color is strongly associated with Klein's art, especially his monochromatic paintings. Because of its striking qualities, International Klein Blue has been used in various artistic and commercial contexts, including fashion, interior design, and branding, often to convey a sense of sophistication and artistic flair. Today, IKB is a registered trademark in France.

The hex color #0623c4, also known as International Klein Blue (IKB), presents significant accessibility challenges, especially in web design. Its extremely dark hue results in very low contrast against typical light backgrounds (like white). This makes text rendered in this color nearly impossible to read for users with visual impairments, including those with low vision or color blindness. According to WCAG guidelines, sufficient contrast between foreground and background colors is crucial for ensuring readability. To meet accessibility standards, IKB should ideally be paired with very light colors, such as white or very pale yellow, to achieve a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Tools like contrast checkers can help determine if color combinations meet these requirements, ensuring content is accessible to a broader audience. Failure to adhere to these guidelines can lead to a frustrating user experience and exclusion of individuals with disabilities.

Shades

Digital Color Formats

RGB
6 35 196
RGB6 35 196
Red
Green
Blue
HSL
230.84deg 94.06% 39.61%
230.8494.0639.61HSL
Hue
Saturation
Lightness
HWB
230.84deg 2.35% 23.14%
230.842.3523.14HWB
Hue
Whiteness
Blackness
hex#0623C4
rgb6 35 196
hsl230.84deg 94.06% 39.61%
cmyk96.94% 82.14% 0% 23.14%
hwb230.84deg 2.35% 23.14%
xyz-d650.11 0.05 0.53
oklch0.3968 0.2394 264.78
oklab0.3968 -0.02 -0.24
CMYK
96.94% 82.14% 0% 23.14%
96.9482.14023.14CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.11 0.05 0.53
0.110.050.53XYZ
X
Y
Z
OKLCH
0.3968 0.2394 264.78
0.39680.2394264.78LCH
Lightness
Chroma
Hue
OKLAB
0.3968 -0.02 -0.24
0.3968-0.02-0.24LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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