The Arch between Copper Opening

#566f6d RGB(86,111,109)

About this color

The Arch between Copper Opening reads as medium-dark and muted — a cyan tone recorded at #566f6d, RGB(86, 111, 109).

#566f6dRGB(86, 111, 109)

HSL 175° · 13% saturation · 39% lightness

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Psychology

Dark cyans feel aquatic and technical — deep ocean, industrial machinery, precision instruments.

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History

Cerulean, a blue-green pigment introduced in the nineteenth century, became important to Impressionist painters for capturing sky and water with unprecedented freshness.

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Design use

In practical terms, a medium-dark cyan like this works well as a background for light-coloured text, as a deep accent stripe, or as an anchoring tone in dark-mode interfaces. It pairs naturally with off-whites, warm creams, and metallic highlights.

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Colour pairings

In terms of colour combinations, combine this cyan with coral and warm white for a fresh, modern palette, or with deep navy and charcoal for a more serious, technical feel.

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Color formats

Name
The Arch between Copper Opening
HEX
#566f6d
RGB
rgb(86,111,109)
RGB%
rgb(33.7%,43.5%,42.7%)
HSL
hsl(175,13%,39%)
HSV
hsv(175,23%,44%)
CMYK
cmyk(23,0,2,56)
LAB
lab(45,-10,-2)
LCH
lch(45,10,191)
sRGB
(0.337,0.435,0.427)
HEX8
#566f6dff
CSS Name
Decimal
086111109

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Color variants

Color info

Lightness
39%
Saturation
13%
Hue
175°
Chroma
10
Temperature
WarmCool
Contrast Preview
The quick brown fox jumps over the lazy dog

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