Ultramarine

#1B13A1

General Information about Ultramarine

The hex color #1B13A1, also known as Ultramarine, is a deep, rich blue that falls within the blue color family. It is a tertiary color, meaning it is created by mixing a primary color (blue) with a secondary color (in this case, a shade of purple). Ultramarine is often associated with feelings of calmness, tranquility, and wisdom. It is a popular color in art, design, and fashion, often used to evoke a sense of sophistication and elegance. The color is described to be mysterious and to enhance the creative toughts. In terms of color theory, Ultramarine is a cool color, which means it tends to recede and create a sense of spaciousness. It is also considered a versatile color, as it can be paired with a variety of other colors to create different moods and effects. However, due to its dark nature, it is important to use it carefully in web design to ensure accessibility.

The hex color #1B13A1, also known as Ultramarine, presents significant accessibility challenges, especially when used as text on a white background. Its low luminance value results in a very low contrast ratio, failing to meet WCAG (Web Content Accessibility Guidelines) standards for both normal and large text. This means that users with visual impairments, including those with low vision or color blindness, will find it difficult to read the text. To improve accessibility, consider using a much lighter color for the background or using #1B13A1 for decorative purposes only, where the meaning is not affected by being invisible. If #1B13A1 must be used for text, pair it with a very light color, such as white (#FFFFFF) or a pale yellow, to achieve an acceptable contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Tools like contrast checkers can help evaluate color combinations.

Shades

Digital Color Formats

RGB
27 19 161
RGB27 19 161
Red
Green
Blue
HSL
243.38 78.89% 35.29%
243.3878.8935.29HSL
Hue
Saturation
Lightness
HWB
243.38 7.45% 36.86%
243.387.4536.86HWB
Hue
Whiteness
Blackness
hex#1B13A1
rgb27 19 161
hsl243.38 78.89% 35.29%
cmyk83.23% 88.2% 0% 36.86%
hwb243.38 7.45% 36.86%
xyz7.12 3.27 33.97
CMYK
83.23% 88.2% 0% 36.86%
83.2388.2036.86CMYK
Cyan
Magenta
Yellow
Key
XYZ
7.12 3.27 33.97
7.123.2733.97XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

HexColo.rs © 2025