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Recognised as Colour

#578C8D

  • #578C8D
  • Cyan
  • Dark
  • Nearest: Cadetblue

#578C8D is a cyan with RGB values 87, 140, 141 and HSL 181°, 24%, 45%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Cadetblue.

Colour values

#578C8D#578C8D
HEX#578C8D
RGBrgb(87, 140, 141)
RGB (0–1)0.3412, 0.549, 0.5529
RGB percentages34.1%, 54.9%, 55.3%
HSLhsl(181.1, 23.7%, 44.7%)
HSV / HSBhsv(181.1, 38.3%, 55.3%)
CMYK38.3%, 0.7%, 0%, 44.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,737,613
CSS custom property--colour: #578C8D;

Brightness & contrast

Relative luminance0.22705WCAG 2.x, 0 is black and 1 is white
Perceived brightness126.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.54:1
Contrast with white3.79:1WCAG normal text: Fail
Contrast with black5.54:1WCAG normal text: AA
Greyscale equivalent#818181
Inverted#A87372

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#85878Dno red cones; affects about 1% of men; ΔE 18 from the original
Deuteranopia#7C808Dno green cones; the most common form, about 1% of men; ΔE 18.7 from the original
Tritanopia#408F8Cno blue cones; rare, and affects men and women equally; ΔE 7.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.79:1WCAG large text: AA
Contrast with black, large text5.54:1WCAG large text: AAA

Named colours

Cadetblue · ΔE 6.9Teal · ΔE 13.5Dark cyan · ΔE 13.9Light slate grey · ΔE 15.9Slate grey · ΔE 15.9Gray · ΔE 18.4
Nearest named CSS colourCadetblue (#5F9EA0)ΔE 6.95, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8D5857
Analogous#578D73, #57718D
Triadic#8D578C, #8C8D57
Split complementary#8D5771, #8D7357
Tetradic#73578D, #8D5857, #718D57

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CFE1E1
Lighter +30%#AFCDCE
Lighter +20%#90BABA
Lighter +10%#70A6A7
Darker −10%#446D6D
Darker −20%#304D4E
Darker −30%#1D2E2E
Darker −40%#090F0F
More saturated +25%#3BA7AA
Less saturated −25%#727272

Channel breakdown

R87
G140
B141
Red87 (34.1%)
Green140 (54.9%)
Blue141 (55.3%)
Hue181.11°
Saturation (HSL)23.68%
Lightness44.71%
Dominant channelBlue
Hex per channelR 57 · G 8C · B 8D

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Every value on this page was computed from “578c8d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.