Ultramarine

#181388

General Information about #181388

The hexadecimal color code #181388 represents a deep shade of blue, often referred to as Ultramarine. It is composed of 9.4% red, 7.5% green, and 53.3% blue. In the RGB color model, this translates to 24 red, 19 green, and 136 blue. This color is mostly used in situations when a bold and strong color is required. Ultramarine is a historical pigment, originally derived from the gemstone lapis lazuli. Due to the cost of lapis lazuli, ultramarine was a very expensive pigment, and was often reserved for important commissions. The color conveys feelings of trust, authority, and intelligence. Today, synthetic ultramarine is widely available, making it an accessible color for various applications.

The color #181388, a deep ultramarine, presents some accessibility challenges, particularly concerning color contrast. When using this color for text or interactive elements, it's crucial to ensure sufficient contrast against the background. A light background is generally recommended to meet WCAG (Web Content Accessibility Guidelines) standards for contrast ratios. For small text, a contrast ratio of at least 4.5:1 is necessary, while for larger text (14pt bold or 18pt regular) a ratio of 3:1 is required. Tools like WebAIM's contrast checker can be used to verify compliance. Avoid pairing this dark color with other dark colors, as this will severely impact readability. Consider using a lighter tint of ultramarine or a completely different, lighter color palette to improve accessibility for users with visual impairments. Providing alternative visual cues, such as icons or underlines, alongside color can also enhance usability.

Shades

Digital Color Formats

RGB
24 19 136
RGB24 19 136
Red
Green
Blue
HSL
242.56deg 75.48% 30.39%
242.5675.4830.39HSL
Hue
Saturation
Lightness
HWB
242.56deg 7.45% 46.67%
242.567.4546.67HWB
Hue
Whiteness
Blackness
hex#181388
rgb24 19 136
hsl242.56deg 75.48% 30.39%
cmyk82.35% 86.03% 0% 46.67%
hwb242.56deg 7.45% 46.67%
xyz-d650.05 0.02 0.23
oklch0.3089 0.1794 270.72
oklab0.3089 0 -0.18
CMYK
82.35% 86.03% 0% 46.67%
82.3586.03046.67CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.05 0.02 0.23
0.050.020.23XYZ
X
Y
Z
OKLCH
0.3089 0.1794 270.72
0.30890.1794270.72LCH
Lightness
Chroma
Hue
OKLAB
0.3089 0 -0.18
0.30890-0.18LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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