Ultramarine

#15159F

General Information about Ultramarine

Ultramarine, represented by the hexadecimal color code #15159F, is a deep, vivid blue pigment originally derived from the precious stone lapis lazuli. The name 'Ultramarine' literally means 'beyond the sea,' reflecting its historical origin as a pigment imported into Europe from mines in Asia and Africa. Chemically, it is a complex sodium aluminum silicate with sulfur, responsible for its intense blue hue. In the RGB color model, its components are Red: 8.24%, Green: 8.24%, and Blue: 62.35%. In the CMYK color model, it consists of Cyan: 87%, Magenta: 87%, Yellow: 0%, and Black: 38%. Historically, Ultramarine was highly prized by artists for its brilliance and permanence, often reserved for depicting important figures or elements in paintings. Today, synthetic versions of Ultramarine are widely available, making it more accessible for various applications.

The color #15159F, also known as Ultramarine, presents significant accessibility challenges, particularly in web design. Its dark hue results in very low contrast when paired with standard text colors like black or dark grays, making content difficult to read for users with visual impairments. To ensure accessibility, it is crucial to use high-contrast text colors such as white or very light shades of yellow or gray. Adhering to WCAG (Web Content Accessibility Guidelines) contrast ratio requirements is essential. A contrast ratio of at least 4.5:1 for normal text and 3:1 for large text is recommended to meet Level AA compliance. Furthermore, avoid using this color for essential UI elements like buttons or links without careful consideration of the foreground color to maintain usability for all users, including those with low vision or color blindness. Proper testing with accessibility tools is highly advised.

Shades

Digital Color Formats

RGB
21 21 159
RGB21 21 159
Red
Green
Blue
HSL
240 76.67% 35.29%
24076.6735.29HSL
Hue
Saturation
Lightness
HWB
240 8.24% 37.65%
2408.2437.65HWB
Hue
Whiteness
Blackness
hex#15159F
rgb21 21 159
hsl240 76.67% 35.29%
cmyk86.79% 86.79% 0% 37.65%
hwb240 8.24% 37.65%
xyz6.84 3.2 33.06
CMYK
86.79% 86.79% 0% 37.65%
86.7986.79037.65CMYK
Cyan
Magenta
Yellow
Key
XYZ
6.84 3.2 33.06
6.843.233.06XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

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