Ultramarine

#17009B

About Ultramarine

The color #17009b, commonly known as Ultramarine, is a deep, rich shade of blue with a hint of violet. Historically, Ultramarine was derived from the precious gemstone lapis lazuli, making it one of the most expensive and prized pigments used by artists during the medieval and Renaissance periods. The name "Ultramarine" literally means "beyond the sea," reflecting its origin as a pigment imported from distant lands. Today, synthetic versions of Ultramarine are widely available, but the color still retains its association with luxury, artistry, and depth. In color psychology, Ultramarine is often linked to feelings of tranquility, intelligence, and creativity. It is frequently used to evoke a sense of calm and sophistication in various designs and applications. Its hexadecimal code is #17009b, representing its composition of red, green, and blue light values.

The hex color #17009b, Ultramarine, presents significant accessibility challenges, especially when used as text on a white background. Its low luminance results in poor contrast, making it difficult for users with visual impairments to read. According to WCAG guidelines, the contrast ratio falls far short of the recommended 4.5:1 for normal text and 3:1 for large text. To improve accessibility, consider using #17009b sparingly for decorative elements only, or pair it with a very light color such as white or a light yellow to ensure sufficient contrast. Alternatively, use a darker shade of blue or a lighter tint of Ultramarine to meet accessibility standards. Providing alternative text descriptions for any images using this color is also crucial for users relying on screen readers. Remember that prioritizing accessibility ensures a more inclusive and user-friendly experience for everyone.

Shades

Digital Color Formats

RGB
23 0 155
RGB23 0 155
Red
Green
Blue
HSL
248.9 100% 30.39%
248.910030.39HSL
Hue
Saturation
Lightness
HWB
248.9 0% 39.22%
248.9039.22HWB
Hue
Whiteness
Blackness
hex#17009B
rgb23 0 155
hsl248.9 100% 30.39%
cmyk85.16% 100% 0% 39.22%
hwb248.9 0% 39.22%
xyz6.27 2.55 31.17
CMYK
85.16% 100% 0% 39.22%
85.16100039.22CMYK
Cyan
Magenta
Yellow
Key
XYZ
6.27 2.55 31.17
6.272.5531.17XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

HexColo.rs © 2025