International Klein Blue

#0624C4

About International Klein Blue

International Klein Blue, often abbreviated as IKB, is a deep blue hue first mixed by the French artist Yves Klein. Klein registered this color as a trademark in 1957. The visual impact of IKB comes from its reliance on ultramarine pigment, as well as Klein's matte, synthetic resin binder, which suspends the color pigment and allows the pigment to maintain its original qualities. This gives the color a specific visual effect that differs from other blue pigments. The color is highly saturated and has a unique velvety appearance, making it instantly recognizable. Its creation and usage have made a huge impact in the artworld. Today it is also used in webdesign and branding, although it should be used with care, especially regarding accessibility.

The hex color #0624c4, also known as International Klein Blue, presents some accessibility challenges, primarily due to its high saturation and relatively low luminance. When used as a background color, it can create insufficient contrast with lighter text colors, making the text difficult to read for individuals with visual impairments. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. To ensure accessibility, it's crucial to pair #0624c4 with very light text colors, such as white or a very pale yellow, and to test the contrast ratio using accessibility tools. Using this color for decorative purposes or larger elements where contrast isn't as critical is advisable. Also avoid using it for crucial UI elements like buttons, if contrast cannot be guaranteed. Consider alternative colors or tints if accessibility cannot be ensured.

Shades

Digital Color Formats

RGB
6 36 196
RGB6 36 196
Red
Green
Blue
HSL
230.53deg 94.06% 39.61%
230.5394.0639.61HSL
Hue
Saturation
Lightness
HWB
230.53deg 2.35% 23.14%
230.532.3523.14HWB
Hue
Whiteness
Blackness
hex#0624C4
rgb6 36 196
hsl230.53deg 94.06% 39.61%
cmyk96.94% 81.63% 0% 23.14%
hwb230.53deg 2.35% 23.14%
xyz-d650.11 0.05 0.53
oklch0.3979 0.2386 264.76
oklab0.3979 -0.02 -0.24
CMYK
96.94% 81.63% 0% 23.14%
96.9481.63023.14CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.11 0.05 0.53
0.110.050.53XYZ
X
Y
Z
OKLCH
0.3979 0.2386 264.76
0.39790.2386264.76LCH
Lightness
Chroma
Hue
OKLAB
0.3979 -0.02 -0.24
0.3979-0.02-0.24LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons