Ultramarine

#0C178C

General Information about Ultramarine

Ultramarine, represented by the hexadecimal color code #0C178C, is a deep and intense shade of blue. It is characterized by its strong saturation and relatively low brightness, which gives it a rich and profound appearance. Historically, Ultramarine was derived from the precious gemstone lapis lazuli, making it one of the most expensive and highly prized pigments used by artists. The name 'Ultramarine' literally means 'beyond the sea,' reflecting its origin from stones imported to Europe from distant lands. In the RGB color model, #0C178C is composed of 4.71% red, 9.02% green, and 54.9% blue. This composition results in a color that is perceived as both calming and authoritative, often associated with qualities such as wisdom, trust, and stability. Its unique spectral signature makes it a distinctive and easily recognizable color.

The color #0C178C, also known as Ultramarine, presents significant accessibility challenges, especially in web design. Its dark hue results in very low contrast against standard light backgrounds, making text and other elements difficult to read for users, particularly those with visual impairments. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. Ultramarine often fails to meet these ratios, necessitating careful consideration of foreground colors. To enhance accessibility, it's advisable to pair #0C178C with very light colors such as white (#FFFFFF) or very light shades of yellow or green to ensure sufficient contrast. Additionally, avoid using this color for crucial interactive elements without proper visual cues, as users with color vision deficiencies may struggle to identify them. Providing alternative text descriptions and ARIA attributes can further improve accessibility for screen reader users.

Shades

Digital Color Formats

RGB
12 23 140
RGB12 23 140
Red
Green
Blue
HSL
234.84deg 84.21% 29.8%
234.8484.2129.8HSL
Hue
Saturation
Lightness
HWB
234.84deg 4.71% 45.1%
234.844.7145.1HWB
Hue
Whiteness
Blackness
hex#0C178C
rgb12 23 140
hsl234.84deg 84.21% 29.8%
cmyk91.43% 83.57% 0% 45.1%
hwb234.84deg 4.71% 45.1%
xyz-d650.05 0.03 0.25
oklch0.3136 0.1841 266.66
oklab0.3136 -0.01 -0.18
CMYK
91.43% 83.57% 0% 45.1%
91.4383.57045.1CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.05 0.03 0.25
0.050.030.25XYZ
X
Y
Z
OKLCH
0.3136 0.1841 266.66
0.31360.1841266.66LCH
Lightness
Chroma
Hue
OKLAB
0.3136 -0.01 -0.18
0.3136-0.01-0.18LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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