Ultramarine

#0A128E

About Ultramarine (#0A128E)

The color #0A128E, also known as Ultramarine, is a deep, rich shade of blue within the blue-violet color spectrum. Its hex code represents a precise combination of red, green, and blue light in the proportions necessary to produce this specific hue. Ultramarine blue has a long and storied history, originally derived from the precious gemstone lapis lazuli. Ground into pigment, it was highly valued for its intense color, used extensively in Renaissance paintings. Today, synthetic ultramarine provides a more accessible alternative, maintaining the same striking hue without the rarity or cost. The color is often associated with royalty, intelligence, and stability, making it a popular choice in branding and design where these qualities are desired. The color represents a shade between the primary blue and violet, in the range of a dark cyan-blue.

The color #0A128E, a deep ultramarine, presents some accessibility challenges, especially when used as text on a white or light background. Its low luminance (brightness) results in low contrast, making it difficult for users with visual impairments to read. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for standard text and 3:1 for large text. This color may not meet these ratios, potentially excluding users with low vision or color blindness. To improve accessibility, consider pairing #0A128E with a much lighter color for text, such as white or a light yellow. Alternatively, use it sparingly for decorative elements or as a background color with high-contrast text overlaid. Tools like contrast checkers can help assess and adjust color combinations to meet accessibility standards, ensuring a more inclusive design.

Shades

Digital Color Formats

RGB
10 18 142
RGB10 18 142
Red
Green
Blue
HSL
236.36deg 86.84% 29.8%
236.3686.8429.8HSL
Hue
Saturation
Lightness
HWB
236.36deg 3.92% 44.31%
236.363.9244.31HWB
Hue
Whiteness
Blackness
hex#0A128E
rgb10 18 142
hsl236.36deg 86.84% 29.8%
cmyk92.96% 87.32% 0% 44.31%
hwb236.36deg 3.92% 44.31%
xyz-d650.05 0.02 0.26
oklch0.3099 0.1906 266.34
oklab0.3099 -0.01 -0.19
CMYK
92.96% 87.32% 0% 44.31%
92.9687.32044.31CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.05 0.02 0.26
0.050.020.26XYZ
X
Y
Z
OKLCH
0.3099 0.1906 266.34
0.30990.1906266.34LCH
Lightness
Chroma
Hue
OKLAB
0.3099 -0.01 -0.19
0.3099-0.01-0.19LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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