Ultramarine

#100D8E

General Information about Ultramarine (#100D8E)

The hexadecimal color #100D8E, also known as Ultramarine, is a deep shade of blue. It belongs to the blue color family, known for its association with feelings of calmness, stability, and intelligence. In the RGB color model, #100D8E is composed of 6.27% red, 5.1% green, and 55.69% blue. This significant amount of blue contributes to its characteristic hue. Ultramarine has historically been a highly valued pigment, derived from the mineral lapis lazuli. In modern usage, it is synthetically produced but retains its captivating depth and richness. Its unique spectral properties make it a favorite among artists, designers, and anyone seeking to add a touch of sophistication to their work.

The color #100d8e, a deep ultramarine, presents some accessibility challenges, particularly concerning color contrast. When used as a background color, it necessitates light text to ensure readability. A contrast ratio of at least 4.5:1 is recommended for standard text and 3:1 for large text to meet WCAG guidelines. Using online contrast checkers is crucial. Avoid pairing this color with other dark shades, as this will make content difficult to perceive for users with visual impairments. When using this color for interactive elements like buttons or links, provide additional visual cues, such as underlines or icons, to enhance usability for all users. Thoughtful consideration of color contrast is paramount to creating inclusive and accessible web experiences. This ensures that content is perceivable and usable by individuals with varying visual abilities.

Shades

Digital Color Formats

RGB
16 13 142
RGB16 13 142
Red
Green
Blue
HSL
241.4 83.23% 30.39%
241.483.2330.39HSL
Hue
Saturation
Lightness
HWB
241.4 5.1% 44.31%
241.45.144.31HWB
Hue
Whiteness
Blackness
hex#100D8E
rgb16 13 142
hsl241.4 83.23% 30.39%
cmyk88.73% 90.85% 0% 44.31%
hwb241.4 5.1% 44.31%
xyz5.24 2.35 25.77
CMYK
88.73% 90.85% 0% 44.31%
88.7390.85044.31CMYK
Cyan
Magenta
Yellow
Key
XYZ
5.24 2.35 25.77
5.242.3525.77XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

HexColo.rs © 2025