Ultramarine

#180D8A

General Information about #180D8A

The hexadecimal color code #180D8A represents a dark shade of blue, often referred to as Ultramarine. In the RGB color model, it consists of 9.41% red, 5.1% green, and 54.12% blue. This composition indicates a strong dominance of blue, resulting in its deep and rich appearance. The color is often associated with feelings of trust, loyalty, wisdom, confidence, intelligence, faith, truth, and heaven. It has been used in art and design for centuries and is often linked to royalty and authority. Ultramarine is not a very common color in everyday life but is used for creative purposes. It is frequently employed in graphic design, web development, and interior decoration to evoke specific emotions or create a particular aesthetic.

The color #180D8A, also known as Ultramarine, presents significant accessibility challenges, particularly in text-based contexts. Its dark hue results in low contrast against lighter backgrounds, making it difficult for individuals with visual impairments to read text rendered in this color. Web developers should avoid using this color for primary text elements or essential interface components without ensuring a sufficiently high contrast ratio (at least 4.5:1 for normal text and 3:1 for large text, as recommended by WCAG guidelines) against the background. To improve accessibility, consider pairing it with a much lighter color or using it sparingly for decorative elements where legibility is less critical. Additionally, providing alternative text descriptions for images or graphics that heavily rely on this color ensures that users with assistive technologies can still understand the content. Thorough testing with accessibility tools is crucial to identify and address any potential issues.

Shades

Digital Color Formats

RGB
24 13 138
RGB24 13 138
Red
Green
Blue
HSL
245.28deg 82.78% 29.61%
245.2882.7829.61HSL
Hue
Saturation
Lightness
HWB
245.28deg 5.1% 45.88%
245.285.145.88HWB
Hue
Whiteness
Blackness
hex#180D8A
rgb24 13 138
hsl245.28deg 82.78% 29.61%
cmyk82.61% 90.58% 0% 45.88%
hwb245.28deg 5.1% 45.88%
xyz-d650.05 0.02 0.24
oklch0.3058 0.1856 270.84
oklab0.3058 0 -0.19
CMYK
82.61% 90.58% 0% 45.88%
82.6190.58045.88CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.05 0.02 0.24
0.050.020.24XYZ
X
Y
Z
OKLCH
0.3058 0.1856 270.84
0.30580.1856270.84LCH
Lightness
Chroma
Hue
OKLAB
0.3058 0 -0.19
0.30580-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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