Nile Blue

#183A55

General Information about Nile Blue

The hexadecimal color #183A55, known as Nile Blue, is a dark, muted shade of blue with a subtle touch of gray. It belongs to the broader family of blue hues, often associated with serenity, stability, and depth. In the RGB color model, it is composed of 9.41% red, 22.75% green, and 33.33% blue. Its CMYK values are 71.77% cyan, 31.71% magenta, 0.00% yellow, and 66.67% black. This color is frequently used in graphic design, web development, and interior decoration to evoke feelings of calmness, professionalism, and trustworthiness. Its relatively low saturation makes it a versatile choice that pairs well with various other colors, from neutral tones to vibrant accents. Nile Blue can be considered a sophisticated alternative to more common blues, offering a unique visual identity.

The hex color #183A55, also known as Nile Blue, presents some accessibility challenges. Its relatively low luminance value of 0.048 means it requires careful consideration when used for text or interactive elements. According to WCAG guidelines, sufficient contrast is crucial for readability. When using #183A55 as a background color, ensure that the foreground text color provides a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Lighter shades of yellows, oranges, or even very light blues or greens would be appropriate choices for foreground text to achieve the necessary contrast. For users with visual impairments, the lack of contrast can make content difficult or impossible to perceive. Tools like contrast checkers can help evaluate the contrast ratio between colors and ensure compliance with accessibility standards, promoting inclusive design.

Shades

Digital Color Formats

RGB
24 58 85
RGB24 58 85
Red
Green
Blue
HSL
206.56deg 55.96% 21.37%
206.5655.9621.37HSL
Hue
Saturation
Lightness
HWB
206.56deg 9.41% 66.67%
206.569.4166.67HWB
Hue
Whiteness
Blackness
hex#183A55
rgb24 58 85
hsl206.56deg 55.96% 21.37%
cmyk71.76% 31.76% 0% 66.67%
hwb206.56deg 9.41% 66.67%
xyz-d650.04 0.04 0.09
oklch0.3371 0.062 245.17
oklab0.3371 -0.03 -0.06
CMYK
71.76% 31.76% 0% 66.67%
71.7631.76066.67CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.04 0.04 0.09
0.040.040.09XYZ
X
Y
Z
OKLCH
0.3371 0.062 245.17
0.33710.062245.17LCH
Lightness
Chroma
Hue
OKLAB
0.3371 -0.03 -0.06
0.3371-0.03-0.06LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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