Ultramarine

#1B0A8E

General Information about #1B0A8E (Ultramarine)

The hex color #1B0A8E, also known as Ultramarine, is a deep shade of blue that evokes feelings of sophistication, depth, and tranquility. In the RGB color model, it is composed of 10.6% red, 3.9% green, and 55.7% blue. In the CMYK color model, which is often used for printing, it is composed of 81% cyan, 93% magenta, 0% yellow, and 44% black. Ultramarine has a rich history, originally derived from the precious stone lapis lazuli, and was highly valued in art and decoration for centuries. Today, it can be reproduced synthetically, making it more accessible for various applications. Its association with royalty and spirituality makes it a powerful choice for designs aiming to communicate trust and wisdom. Its light reflectance value is very low.

The hex color #1B0A8E, a deep ultramarine, presents accessibility challenges for web design. Its low luminance value (approximately 3) means text rendered in white may barely meet the WCAG AA contrast ratio threshold of 4.5:1 for normal text sizes against this background. Larger text sizes (14pt bold or 18pt regular) will likely meet the minimum contrast requirement, but careful testing is crucial. For optimal accessibility, consider lighter text colors (avoiding pure black) or employing color combinations with high contrast ratios, such as yellows, oranges, or lighter shades of green. Using a color contrast analyzer is highly recommended during the design process to ensure compliance with accessibility standards and to create a more usable experience for individuals with visual impairments. Also consider the color blindness of users when selecting your colors. Check colors with tools.

Shades

Digital Color Formats

RGB
27 10 142
RGB27 10 142
Red
Green
Blue
HSL
247.73deg 86.84% 29.8%
247.7386.8429.8HSL
Hue
Saturation
Lightness
HWB
247.73deg 3.92% 44.31%
247.733.9244.31HWB
Hue
Whiteness
Blackness
hex#1B0A8E
rgb27 10 142
hsl247.73deg 86.84% 29.8%
cmyk80.99% 92.96% 0% 44.31%
hwb247.73deg 3.92% 44.31%
xyz-d650.05 0.02 0.26
oklch0.3106 0.1909 271.74
oklab0.3106 0.01 -0.19
CMYK
80.99% 92.96% 0% 44.31%
80.9992.96044.31CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.05 0.02 0.26
0.050.020.26XYZ
X
Y
Z
OKLCH
0.3106 0.1909 271.74
0.31060.1909271.74LCH
Lightness
Chroma
Hue
OKLAB
0.3106 0.01 -0.19
0.31060.01-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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