Ultramarine

#0A148C

General Information about Ultramarine

The hexadecimal color #0A148C, also known as Ultramarine, is a deep, rich shade of blue. It is composed of 3.92% red, 7.84% green, and 54.9% blue. In the RGB color space, it is represented as rgb(10, 20, 140). Ultramarine's origins trace back to the pigment derived from the gemstone lapis lazuli, prized for its vibrant blue hue since ancient times. This color has been used throughout history in art, textiles, and decorative objects, symbolizing royalty, spirituality, and intellectual pursuit. Because of its pigment, it used to be very expensive and available only to the rich. In modern digital applications, Ultramarine can evoke feelings of trust, stability, and authority, making it a suitable choice for branding, user interfaces, and data visualization.

The color #0A148C, a deep ultramarine, presents significant accessibility challenges, particularly in text-based applications. Its low luminance value of approximately 1% means that it offers very little contrast against darker backgrounds, rendering it nearly invisible. When used as text or interactive elements, it requires careful pairing with very light colors to ensure readability and usability. 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 to meet Level AA compliance. Using #0A148C as text on a white background results in a contrast ratio far below these recommendations. Therefore, it is crucial to use a color contrast checker to ensure compliance. In general, this color is not suited as a background or text color. Its better suited as a decorative accent color.

Shades

Digital Color Formats

RGB
10 20 140
RGB10 20 140
Red
Green
Blue
HSL
235.38deg 86.67% 29.41%
235.3886.6729.41HSL
Hue
Saturation
Lightness
HWB
235.38deg 3.92% 45.1%
235.383.9245.1HWB
Hue
Whiteness
Blackness
hex#0A148C
rgb10 20 140
hsl235.38deg 86.67% 29.41%
cmyk92.86% 85.71% 0% 45.1%
hwb235.38deg 3.92% 45.1%
xyz-d650.05 0.02 0.25
oklch0.3094 0.1868 266.34
oklab0.3094 -0.01 -0.19
CMYK
92.86% 85.71% 0% 45.1%
92.8685.71045.1CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.05 0.02 0.25
0.050.020.25XYZ
X
Y
Z
OKLCH
0.3094 0.1868 266.34
0.30940.1868266.34LCH
Lightness
Chroma
Hue
OKLAB
0.3094 -0.01 -0.19
0.3094-0.01-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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