Ultramarine

#0D188E

General Information about Ultramarine

The hex color #0D188E, also known as Ultramarine, is a deep and intense shade of blue. In the RGB color model, it is composed of 5.1% red, 9.4% green, and 55.7% blue. This significant presence of blue gives Ultramarine its characteristic depth and richness. The color's name, Ultramarine, originates from the Latin 'ultramarinus,' meaning 'beyond the sea,' as the pigment was originally derived from the rare and expensive mineral lapis lazuli, imported from distant lands. Historically, it was highly prized by artists and was often reserved for depicting the robes of the Virgin Mary. Today, synthetic Ultramarine is readily available, making it accessible for various applications, from art and design to manufacturing and digital media. Its strong association with royalty, intellect, and stability makes it a versatile choice for conveying authority and sophistication.

The hex color #0D188E, also known as Ultramarine, presents specific accessibility challenges due to its dark nature. When used as a background color, it requires very light text (white or near-white) to ensure sufficient contrast for readability. According to WCAG guidelines, the contrast ratio between text and background should be at least 4.5:1 for normal text and 3:1 for large text. Ultramarine, being a deep shade of blue, necessitates careful consideration of foreground text colors to meet these standards. Using tools like contrast checkers is essential to verify compliance. Moreover, avoid pairing it with other dark colors, as this can lead to a poor visual experience, especially for users with visual impairments. Ensure interactive elements like buttons and links have clear visual cues to distinguish them from static text.

Shades

Digital Color Formats

RGB
13 24 142
RGB13 24 142
Red
Green
Blue
HSL
234.88 83.23% 30.39%
234.8883.2330.39HSL
Hue
Saturation
Lightness
HWB
234.88 5.1% 44.31%
234.885.144.31HWB
Hue
Whiteness
Blackness
hex#0D188E
rgb13 24 142
hsl234.88 83.23% 30.39%
cmyk90.85% 83.1% 0% 44.31%
hwb234.88 5.1% 44.31%
xyz5.38 2.69 25.83
CMYK
90.85% 83.1% 0% 44.31%
90.8583.1044.31CMYK
Cyan
Magenta
Yellow
Key
XYZ
5.38 2.69 25.83
5.382.6925.83XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

HexColo.rs © 2025