Ultramarine

#180E8A

General Information about Ultramarine

Ultramarine, represented by the hex code #180E8A, is a deep blue color with a rich history. Originally derived from the precious mineral lapis lazuli, it was highly valued for its vibrant and lasting hue, often used in Renaissance paintings. Today, synthetic ultramarine is widely available, retaining the same captivating color at a fraction of the cost. In the RGB color model, Ultramarine consists of 9.41% red, 5.49% green, and 54.12% blue. Its CMYK values are 83% cyan, 90% magenta, 0% yellow, and 46% black. This intense blue shade is often associated with depth, wisdom, and loyalty, making it a popular choice for various applications, from web design to fashion and interior decor. The color's high blue component lends it a cool and calming effect, suitable for creating a sense of serenity or sophistication.

The color #180E8A, also known as Ultramarine, presents some accessibility challenges, especially in web design. Its dark hue results in low contrast against light backgrounds, potentially making text or interactive elements difficult to read for users with visual impairments. According to WCAG guidelines, sufficient contrast ratios are crucial for ensuring readability. When using Ultramarine, it is essential to pair it with very light colors like white or pale yellow to achieve a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Careful consideration should also be given to the color's use in links and buttons, ensuring they are clearly distinguishable from the surrounding content through additional cues like underlines or borders. Providing alternative text for images using this color is also vital for screen reader users.

Shades

Digital Color Formats

RGB
24 14 138
RGB24 14 138
Red
Green
Blue
HSL
244.84deg 81.58% 29.8%
244.8481.5829.8HSL
Hue
Saturation
Lightness
HWB
244.84deg 5.49% 45.88%
244.845.4945.88HWB
Hue
Whiteness
Blackness
hex#180E8A
rgb24 14 138
hsl244.84deg 81.58% 29.8%
cmyk82.61% 89.86% 0% 45.88%
hwb244.84deg 5.49% 45.88%
xyz-d650.05 0.02 0.24
oklch0.3067 0.185 270.8
oklab0.3067 0 -0.19
CMYK
82.61% 89.86% 0% 45.88%
82.6189.86045.88CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.05 0.02 0.24
0.050.020.24XYZ
X
Y
Z
OKLCH
0.3067 0.185 270.8
0.30670.185270.8LCH
Lightness
Chroma
Hue
OKLAB
0.3067 0 -0.19
0.30670-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons