Ultramarine

#1B108B

General Information about #1B108B

The hexadecimal color code #1B108B represents a specific point in the color spectrum, characterized by its deep and intense blue-violet hue. Commonly known as Ultramarine, this color derives its name from the historical pigment made from the gemstone lapis lazuli, prized for its vivid blue color. In the RGB (Red, Green, Blue) color model, #1B108B is composed of 10.6% red, 6.3% green, and 54.5% blue. This significant dominance of blue contributes to its characteristic deep blue appearance. In the CMYK (Cyan, Magenta, Yellow, Black) color model, it consists of 81% cyan, 88% magenta, 0% yellow, and 45% black. This indicates a high concentration of cyan and magenta inks, resulting in the rich blue-violet color. #1B108B falls within the blue color family, evoking feelings of calmness, stability, and wisdom. It is often associated with royalty, trust, and authority, making it a popular choice for various design applications.

The color #1B108B, a deep ultramarine, presents specific accessibility challenges. Its low luminance value (relative darkness) means that text rendered in this color requires very light backgrounds to ensure sufficient contrast for readability, especially for users with visual impairments. A contrast ratio of at least 4.5:1 is recommended for normal-sized text and 3:1 for large text (14pt bold or 18pt regular) to meet WCAG 2.1 AA standards. When using this color, careful consideration should be given to its context. Avoid pairing it with other dark colors, and ensure that interactive elements such as links or buttons are clearly distinguishable through sufficient contrast and, ideally, additional visual cues like underlines or icons. Providing alternative color schemes can also improve accessibility for a wider range of users.

Shades

Digital Color Formats

RGB
27 16 139
RGB27 16 139
Red
Green
Blue
HSL
245.37 79.35% 30.39%
245.3779.3530.39HSL
Hue
Saturation
Lightness
HWB
245.37 6.27% 45.49%
245.376.2745.49HWB
Hue
Whiteness
Blackness
hex#1B108B
rgb27 16 139
hsl245.37 79.35% 30.39%
cmyk80.58% 88.49% 0% 45.49%
hwb245.37 6.27% 45.49%
xyz5.3 2.47 24.62
CMYK
80.58% 88.49% 0% 45.49%
80.5888.49045.49CMYK
Cyan
Magenta
Yellow
Key
XYZ
5.3 2.47 24.62
5.32.4724.62XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

HexColo.rs © 2025