Ultramarine

#1808AE

General Information about Ultramarine

The hexadecimal color #1808AE, also known as Ultramarine, is a deep and vibrant shade of blue. It's composed of 9.4% red, 3.1% green, and 68.2% blue. In the RGB color space, it's represented as (24, 8, 174). Ultramarine is often associated with qualities such as trust, authority, and sophistication. This color has a rich history, derived from the pigment made from lapis lazuli, a semi-precious stone. Due to its historical value and intense hue, ultramarine was highly prized by artists throughout history. Today, synthetic ultramarine is widely available, but the name still evokes the color's regal origins and its use in iconic artworks. It's considered a cool color and it can create a sense of calm and serenity.

The color #1808AE, a deep shade of Ultramarine, presents significant accessibility challenges in web design. Its low luminance value of approximately 4% means that text rendered in this color requires a very light foreground color to meet WCAG (Web Content Accessibility Guidelines) contrast requirements. Using white (#FFFFFF) or very light gray text is crucial to ensure readability for users with visual impairments. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Background colors should also be carefully chosen to provide sufficient contrast. Tools such as contrast checkers are highly valuable for verifying compliance. Failure to meet contrast requirements can result in content being inaccessible to a significant portion of users, including those with low vision or color blindness. Alternatives include lighter shades of blue or using #1808AE sparingly for decorative elements rather than essential text or interactive components.

Shades

Digital Color Formats

RGB
24 8 174
RGB24 8 174
Red
Green
Blue
HSL
245.78 91.21% 35.69%
245.7891.2135.69HSL
Hue
Saturation
Lightness
HWB
245.78 3.14% 31.76%
245.783.1431.76HWB
Hue
Whiteness
Blackness
hex#1808AE
rgb24 8 174
hsl245.78 91.21% 35.69%
cmyk86.21% 95.4% 0% 31.76%
hwb245.78 3.14% 31.76%
xyz8.1 3.42 40.28
CMYK
86.21% 95.4% 0% 31.76%
86.2195.4031.76CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.1 3.42 40.28
8.13.4240.28XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

HexColo.rs © 2025