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Colour

#557D82

  • #557D82
  • Cyan
  • Dark
  • Nearest: Slate grey

#557D82 is a cyan with RGB values 85, 125, 130 and HSL 187°, 21%, 42%. It is a dark colour, so black text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Slate grey.

Colour values

#557D82#557D82
HEX#557D82
RGBrgb(85, 125, 130)
RGB (0–1)0.3333, 0.4902, 0.5098
RGB percentages33.3%, 49%, 51%
HSLhsl(186.7, 20.9%, 42.2%)
HSV / HSBhsv(186.7, 34.6%, 51%)
CMYK34.6%, 3.8%, 0%, 49%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,602,690
CSS custom property--colour: #557D82;

Brightness & contrast

Relative luminance0.1821WCAG 2.x, 0 is black and 1 is white
Perceived brightness115.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.64:1
Contrast with white4.52:1WCAG normal text: AA
Contrast with black4.64:1WCAG normal text: AA
Greyscale equivalent#757575
Inverted#AA827D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#777A82no red cones; affects about 1% of men; ΔE 13.4 from the original
Deuteranopia#6F7482no green cones; the most common form, about 1% of men; ΔE 13.8 from the original
Tritanopia#44807Eno blue cones; rare, and affects men and women equally; ΔE 7.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.52:1WCAG large text: AAA
Contrast with black, large text4.64:1WCAG large text: AAA

Named colours

Slate grey · ΔE 11.4Light slate grey · ΔE 12.6Cadetblue · ΔE 13.4Gray · ΔE 15Dim grey · ΔE 15.4Teal · ΔE 16.4
Nearest named CSS colourSlate grey (#708090)ΔE 11.38, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#825A55
Analogous#558270, #556782
Triadic#82557D, #7D8255
Split complementary#825567, #827055
Tetradic#705582, #825A55, #678255

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8D9DB
Lighter +30%#A9C4C7
Lighter +20%#8AAEB3
Lighter +10%#6B999F
Darker −10%#415F63
Darker −20%#2D4244
Darker −30%#192425
Darker −40%#040607
More saturated +25%#3A929D
Less saturated −25%#6B6B6B

Channel breakdown

R85
G125
B130
Red85 (33.3%)
Green125 (49%)
Blue130 (51%)
Hue186.67°
Saturation (HSL)20.93%
Lightness42.16%
Dominant channelBlue
Hex per channelR 55 · G 7D · B 82

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Every value on this page was computed from “557d82” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.