Blue
Strong Blue
Strong Blue
#006374Click to copy
Strong Blue Parameter Conversion Table
More converters →HEX#006374Copy
RGBrgb(0, 99, 116)Copy
HSLhsl(189, 100%, 23%)Copy
HSV/HSBhsv(189, 100%, 45%)Copy
CMYKcmyk(100%, 15%, 0%, 55%)Copy
Strong Blue Color Schemes
Complementary
#006374
Click to copy#741100
Click to copyAnalogous
#00744B
Click to copy#002974
Click to copySplit Complementary
#740029
Click to copy#744B00
Click to copyMonochromatic
#006374
Click to copy#10AECA
Click to copy#4FD9F1
Click to copy#000C0E
Click to copy#000000
Click to copy#000000
Click to copyStrong Blue WCAG Accessibility Contrast
WCAG Calculator →The contrast ratio of this color against common foreground/background colors (based on the WCAG 2.1 standard)
Sample text Aa
White background #FFFFFF
6.91 : 1
AA NormalAA LargeAAA NormalAAA Large
Sample text Aa
Black background #000000
3.04 : 1
AA NormalAA LargeAAA NormalAAA Large
Sample text Aa
Light gray background #F5F5F5
6.34 : 1
AA NormalAA LargeAAA NormalAAA Large
Sample text Aa
Dark gray background #333333
1.83 : 1
AA NormalAA LargeAAA NormalAAA Large
Strong Blue Shade Variants
Gradient Generator →Lighten with White Mixed with white for a lighter, softer color
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Darken with Black Mixed with black for a deeper, heavier color
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Muted / Morandi Mixed with gray and desaturated for a sophisticated muted tone
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Strong Blue Color Introduction
Definition
Strong Blue (HEX #006374) has the RGB value rgb(0, 99, 116), the HSL value hsl(189°, 100%, 23%) and the CMYK print value cmyk(100%, 15%, 0%, 55%). In terms of color schemes, the complement of Strong Blue is #741100, and placing the two side by side produces a striking, eye-catching contrast; paired with the analogous colors #00744B and #002974 that sit next to it on the color wheel, it transitions naturally and harmoniously; in a split-complementary scheme (#740029, #744B00) it keeps its contrast tension without losing layering; and a monochromatic scheme built on Strong Blue uses gradients of lightness and saturation to create a unified design with a strong sense of depth. Under the WCAG accessibility standard, Strong Blue has a contrast ratio of 6.91:1 against white and 3.04:1 against black; paired with a white background it reaches AA, giving body text good readability.
Color Characteristics
Cyan sits between blue and green, evoking lakes, glaciers and the early morning sky. Clear and tech-savvy, it performs especially well in tech branding and summer themes. Specifically, Strong Blue has a lightness of 23% and a saturation of 100%, steady and powerful as a background or primary color, pairing well with light text for good readability; moreover, its saturation is extremely high and its visual tension is strong, so it works best used sparingly as a focal accent. In a word: A deep, powerful blue.
Color Psychology
Cyan can evoke freshness, calm and trust, with a marked calming effect; psychologically it symbolizes purity, professionalism and technology. For this reason Strong Blue tends to leave a first impression of being fresh and pure in the viewer’s mind, and this emotional tone also defines the role it plays in design.
Best Uses
Cyan suits tech products, summer themes, cleaning and care products and any scene that needs a fresh, modern feel. In real projects, Strong Blue is also often used as a dark background or heading text color; in “Cyan”-themed designs, the adjacent colors or lightness gradients built around it quickly establish a cohesive, clearly layered color scheme.
Strong Blue Featured In
This color is included in the following color cards and color families. Click a card to browse more colors in the corresponding collection.