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Recognised as Colour

#578B89

  • #578B89
  • Cyan
  • Dark
  • Nearest: Cadetblue

#578B89 is a cyan with RGB values 87, 139, 137 and HSL 178°, 23%, 44%. 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

#578B89#578B89
HEX#578B89
RGBrgb(87, 139, 137)
RGB (0–1)0.3412, 0.5451, 0.5373
RGB percentages34.1%, 54.5%, 53.7%
HSLhsl(177.7, 23%, 44.3%)
HSV / HSBhsv(177.7, 37.4%, 54.5%)
CMYK37.4%, 0%, 1.4%, 45.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,737,353
CSS custom property--colour: #578B89;

Brightness & contrast

Relative luminance0.22298WCAG 2.x, 0 is black and 1 is white
Perceived brightness125.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.46:1
Contrast with white3.85:1WCAG normal text: Fail
Contrast with black5.46:1WCAG normal text: AA
Greyscale equivalent#808080
Inverted#A87476

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#858689no red cones; affects about 1% of men; ΔE 18.3 from the original
Deuteranopia#7C7F8Ano green cones; the most common form, about 1% of men; ΔE 19.1 from the original
Tritanopia#428E8Ano blue cones; rare, and affects men and women equally; ΔE 6.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.85:1WCAG large text: AA
Contrast with black, large text5.46:1WCAG large text: AAA

Named colours

Cadetblue · ΔE 7.7Teal · ΔE 13.3Dark cyan · ΔE 13.8Slate grey · ΔE 16.9Light slate grey · ΔE 17Gray · ΔE 18.3
Nearest named CSS colourCadetblue (#5F9EA0)ΔE 7.68, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8B5759
Analogous#578B6F, #57738B
Triadic#89578B, #8B8957
Split complementary#8B5773, #8B6F57
Tetradic#6F578B, #8B5759, #738B57

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CEE0DF
Lighter +30%#AECDCB
Lighter +20%#8FB9B7
Lighter +10%#70A5A3
Darker −10%#436C6A
Darker −20%#304C4B
Darker −30%#1C2D2C
Darker −40%#080E0D
More saturated +25%#3BA7A3
Less saturated −25%#717171

Channel breakdown

R87
G139
B137
Red87 (34.1%)
Green139 (54.5%)
Blue137 (53.7%)
Hue177.69°
Saturation (HSL)23.01%
Lightness44.31%
Dominant channelGreen
Hex per channelR 57 · G 8B · B 89

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Every value on this page was computed from “578b89” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.