Ultramarine

#0000A5

About Ultramarine

Ultramarine, represented by the hexadecimal color code #0000A5, is a deep, vivid shade of blue. It is named after the pigment derived from lapis lazuli, a semi-precious stone, which was historically highly valued and used by Renaissance artists. The color is composed of 0% red, 0% green, and 64.7% blue. In the RGB color model, Ultramarine is considered a primary blue, forming the foundation for many other shades of blue. It evokes feelings of depth, stability, and trust. The color finds usage across various fields, from digital interfaces to physical products, depending on the intended user experience.

The color #0000A5, also known as Ultramarine, presents significant accessibility challenges, especially in web design. Its dark hue results in very low contrast when paired with similarly dark colors, making text and other elements difficult to read for users, including those with visual impairments. According to WCAG guidelines, sufficient contrast is essential for readability. Ultramarine requires a light background color to meet minimum contrast ratios. Using color contrast analyzers is crucial to ensure compliance. Furthermore, avoid using Ultramarine as the sole indicator of important information, as colorblind users may not be able to distinguish it. Consider providing redundant cues, such as text labels or icons, to enhance accessibility. Careful consideration and testing are necessary to implement Ultramarine responsibly.

Shades

Digital Color Formats

RGB
0 0 165
RGB0 0 165
Red
Green
Blue
HSL
240deg 100% 32.35%
24010032.35HSL
Hue
Saturation
Lightness
HWB
240deg 0% 35.29%
240035.29HWB
Hue
Whiteness
Blackness
hex#0000A5
rgb0 0 165
hsl240deg 100% 32.35%
cmyk100% 100% 0% 35.29%
hwb240deg 0% 35.29%
xyz-d650.07 0.03 0.36
oklch0.3263 0.2262 264.07
oklab0.3263 -0.02 -0.22
CMYK
100% 100% 0% 35.29%
100100035.29CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.07 0.03 0.36
0.070.030.36XYZ
X
Y
Z
OKLCH
0.3263 0.2262 264.07
0.32630.2262264.07LCH
Lightness
Chroma
Hue
OKLAB
0.3263 -0.02 -0.22
0.3263-0.02-0.22LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons