Ultramarine

#150D8A

General Information

The hexadecimal color code #150D8A represents a dark shade of blue, often referred to as Ultramarine. In the RGB color model, it is composed of 8.24% red, 5.1% green, and 54.12% blue. This composition results in a color that is perceived as deep, rich, and somewhat mysterious. Ultramarine has a strong historical association with art, as it was originally derived from the gemstone lapis lazuli, making it one of the most expensive pigments. Its popularity in paintings throughout history speaks to its aesthetic appeal and enduring quality. In modern contexts, this color is frequently used in design and digital media to convey feelings of trust, stability, and sophistication. It is often chosen for branding in industries seeking to project an image of reliability and competence.

The color #150D8A, a deep ultramarine, presents several accessibility considerations for web development. Its low luminance value means it requires careful pairing with contrasting colors to ensure sufficient readability for users, especially those with visual impairments. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. When using #150D8A as a background, light colors like white or bright yellow should be used for text. Conversely, if used as a text color, a light background is essential. The color's strong blue hue can also pose challenges for users with color vision deficiencies; therefore, relying solely on color to convey information should be avoided. Providing alternative cues, such as text labels or icons, is crucial to ensure inclusivity and a positive user experience. Proper use of ARIA attributes can further enhance accessibility by providing assistive technologies with semantic information about the color's role and meaning within the interface. Testing with accessibility evaluation tools is recommended.

Shades

Digital Color Formats

RGB
21 13 138
RGB21 13 138
Red
Green
Blue
HSL
243.84deg 82.78% 29.61%
243.8482.7829.61HSL
Hue
Saturation
Lightness
HWB
243.84deg 5.1% 45.88%
243.845.145.88HWB
Hue
Whiteness
Blackness
hex#150D8A
rgb21 13 138
hsl243.84deg 82.78% 29.61%
cmyk84.78% 90.58% 0% 45.88%
hwb243.84deg 5.1% 45.88%
xyz-d650.05 0.02 0.24
oklch0.3042 0.1864 269.73
oklab0.3042 0 -0.19
CMYK
84.78% 90.58% 0% 45.88%
84.7890.58045.88CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.05 0.02 0.24
0.050.020.24XYZ
X
Y
Z
OKLCH
0.3042 0.1864 269.73
0.30420.1864269.73LCH
Lightness
Chroma
Hue
OKLAB
0.3042 0 -0.19
0.30420-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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