Ultramarine

#04009B

General Information

Ultramarine, represented by the hexadecimal color code #04009B, is a deep and intense shade of blue. Historically, ultramarine was derived from the precious mineral lapis lazuli, making it one of the most expensive pigments during the medieval and Renaissance periods. Its name, meaning 'beyond the sea,' reflects its importation into Europe from mines in Asia. Today, synthetic ultramarine is widely available, retaining the color's characteristic brilliance without the exorbitant cost. This color evokes feelings of depth, stability, and sophistication, making it a popular choice in various design applications. In color psychology, blue is often associated with trust, loyalty, and intelligence, attributes that contribute to ultramarine's appeal in branding and visual communication. Its richness and depth make it a timeless and captivating color.

The color #04009B, a deep ultramarine, presents significant accessibility challenges, especially in web design. Its low luminance value of 0.002 means it provides very poor contrast against white or other light backgrounds. According to WCAG guidelines, sufficient contrast is crucial for users with visual impairments to perceive content effectively. A contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. This color falls far short of these requirements, potentially making text illegible for many users. To improve accessibility, it is imperative to pair this dark blue with much lighter colors. Considering alternatives with higher luminance, or implementing text shadows or borders, are crucial strategies. Furthermore, avoid using this color for interactive elements without clear visual cues, as users may struggle to identify them.

Shades

Digital Color Formats

RGB
4 0 155
RGB4 0 155
Red
Green
Blue
HSL
241.55 100% 30.39%
241.5510030.39HSL
Hue
Saturation
Lightness
HWB
241.55 0% 39.22%
241.55039.22HWB
Hue
Whiteness
Blackness
hex#04009B
rgb4 0 155
hsl241.55 100% 30.39%
cmyk97.42% 100% 0% 39.22%
hwb241.55 0% 39.22%
xyz5.97 2.39 31.16
CMYK
97.42% 100% 0% 39.22%
97.42100039.22CMYK
Cyan
Magenta
Yellow
Key
XYZ
5.97 2.39 31.16
5.972.3931.16XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

HexColo.rs © 2025