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Recognised as Colour

#558F81

  • #558F81
  • Cyan
  • Dark
  • Nearest: Cadetblue

#558F81 is a cyan with RGB values 85, 143, 129 and HSL 166°, 25%, 45%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Cadetblue.

Colour values

#558F81#558F81
HEX#558F81
RGBrgb(85, 143, 129)
RGB (0–1)0.3333, 0.5608, 0.5059
RGB percentages33.3%, 56.1%, 50.6%
HSLhsl(165.5, 25.4%, 44.7%)
HSV / HSBhsv(165.5, 40.6%, 56.1%)
CMYK40.6%, 0%, 9.8%, 43.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,607,297
CSS custom property--colour: #558F81;

Brightness & contrast

Relative luminance0.23161WCAG 2.x, 0 is black and 1 is white
Perceived brightness126.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.63:1
Contrast with white3.73:1WCAG normal text: Fail
Contrast with black5.63:1WCAG normal text: AA
Greyscale equivalent#828282
Inverted#AA707E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#8B8880no red cones; affects about 1% of men; ΔE 22.3 from the original
Deuteranopia#818182no green cones; the most common form, about 1% of men; ΔE 22.8 from the original
Tritanopia#42908Bno 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 text3.73:1WCAG large text: AA
Contrast with black, large text5.63:1WCAG large text: AAA

Named colours

Cadetblue · ΔE 11Dark cyan · ΔE 13.6Teal · ΔE 13.7Light seagreen · ΔE 20Gray · ΔE 22.6Dark seagreen · ΔE 23.7
Nearest named CSS colourCadetblue (#5F9EA0)ΔE 11.05, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8F5563
Analogous#558F64, #55808F
Triadic#81558F, #8F8155
Split complementary#8F5580, #8F6455
Tetradic#64558F, #8F5563, #808F55

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CEE2DD
Lighter +30%#AECFC7
Lighter +20%#8EBCB1
Lighter +10%#6EA99B
Darker −10%#426F64
Darker −20%#2F4F47
Darker −30%#1C2F2A
Darker −40%#090F0E
More saturated +25%#39AB90
Less saturated −25%#717272

Channel breakdown

R85
G143
B129
Red85 (33.3%)
Green143 (56.1%)
Blue129 (50.6%)
Hue165.52°
Saturation (HSL)25.44%
Lightness44.71%
Dominant channelGreen
Hex per channelR 55 · G 8F · B 81

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Every value on this page was computed from “558f81” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.