Ultramarine

#1804B0

General Information about Ultramarine

The color #1804B0, also known as Ultramarine, is a deep, saturated blue hue that evokes feelings of tranquility, depth, and sophistication. It belongs to the blue color family and is characterized by its rich, intense pigment. Historically, Ultramarine was derived from the rare and precious mineral lapis lazuli, making it one of the most expensive pigments available during the medieval and Renaissance periods. Artists such as Johannes Vermeer and Leonardo da Vinci frequently employed Ultramarine in their masterpieces to achieve unparalleled brilliance and depth of color. Today, Ultramarine is synthetically produced, making it more accessible for various applications, including art, design, and manufacturing. Its unique spectral properties make it a versatile color choice for both digital and physical media.

The hex color #1804B0, also known as Ultramarine, presents significant accessibility challenges, particularly when used as a foreground color on a white or light background. Its low luminance results in poor contrast, making it difficult for individuals with visual impairments, including those with low vision or color blindness, to discern text or other visual elements. According to WCAG guidelines, sufficient contrast is crucial for readability and usability. A contrast ratio of at least 4.5:1 is recommended for standard text and 3:1 for large text. Ultramarine typically fails to meet these standards, necessitating careful consideration of color pairings. To improve accessibility, consider using a lighter background or pairing Ultramarine with a much lighter foreground color to achieve adequate contrast. Alternatively, using Ultramarine sparingly for purely decorative elements may be acceptable.

Shades

Digital Color Formats

RGB
24 4 176
RGB24 4 176
Red
Green
Blue
HSL
246.98 95.56% 35.29%
246.9895.5635.29HSL
Hue
Saturation
Lightness
HWB
246.98 1.57% 30.98%
246.981.5730.98HWB
Hue
Whiteness
Blackness
hex#1804B0
rgb24 4 176
hsl246.98 95.56% 35.29%
cmyk86.36% 97.73% 0% 30.98%
hwb246.98 1.57% 30.98%
xyz8.26 3.42 41.3
CMYK
86.36% 97.73% 0% 30.98%
86.3697.73030.98CMYK
Cyan
Magenta
Yellow
Key
XYZ
8.26 3.42 41.3
8.263.4241.3XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

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