Ultramarine

#21019A

General Information about Ultramarine (#21019A)

The hexadecimal color #21019A, also known as Ultramarine, is a dark shade of blue-violet. It's a color that evokes feelings of depth, sophistication, and creativity. In the RGB color model, #21019A is composed of 12.9% red, 0.4% green, and 60.4% blue. In the CMYK color model, it consists of 79% cyan, 99% magenta, 0% yellow, and 40% black. Ultramarine has a hue angle of 248.1 degrees, a saturation of 99.2%, and a lightness of 30.4%. This particular shade of blue is often associated with royalty, wisdom, and spirituality. It's a versatile color that can be used in various design contexts to convey different moods and messages. The color name comes from the pigment of the same name, originally made from ground lapis lazuli.

The color #21019A, a deep ultramarine, presents several accessibility considerations for web developers. Its dark hue means that careful attention must be paid to contrast ratios. When used as a background, it necessitates very light text (white or near-white) to ensure readability, ideally meeting WCAG AA or AAA standards. Conversely, as a text color, it requires a very light background. It's crucial to avoid pairing it with similarly dark colors, as this would create insufficient contrast, making content difficult or impossible for users with visual impairments to perceive. Providing sufficient contrast is key to ensuring accessibility for a wide range of users, including those with low vision or color blindness. Also, avoid using this color as the sole means of conveying important information; always provide alternative text or visual cues.

Shades

Digital Color Formats

RGB
33 1 154
RGB33 1 154
Red
Green
Blue
HSL
252.55 98.71% 30.39%
252.5598.7130.39HSL
Hue
Saturation
Lightness
HWB
252.55 0.39% 39.61%
252.550.3939.61HWB
Hue
Whiteness
Blackness
hex#21019A
rgb33 1 154
hsl252.55 98.71% 30.39%
cmyk78.57% 99.35% 0% 39.61%
hwb252.55 0.39% 39.61%
xyz6.47 2.68 30.75
CMYK
78.57% 99.35% 0% 39.61%
78.5799.35039.61CMYK
Cyan
Magenta
Yellow
Key
XYZ
6.47 2.68 30.75
6.472.6830.75XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

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