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Colour

#18A580

  • #18A580
  • Cyan
  • Dark
  • Nearest: Sea green

#18A580 is a cyan with RGB values 24, 165, 128 and HSL 164°, 75%, 37%. It is a dark colour, so black text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Sea green.

Colour values

#18A580#18A580
HEX#18A580
RGBrgb(24, 165, 128)
RGB (0–1)0.0941, 0.6471, 0.502
RGB percentages9.4%, 64.7%, 50.2%
HSLhsl(164.3, 74.6%, 37.1%)
HSV / HSBhsv(164.3, 85.5%, 64.7%)
CMYK85.5%, 0%, 22.4%, 35.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,615,232
CSS custom property--colour: #18A580;

Brightness & contrast

Relative luminance0.28663WCAG 2.x, 0 is black and 1 is white
Perceived brightness134.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.73:1
Contrast with white3.12:1WCAG normal text: Fail
Contrast with black6.73:1WCAG normal text: AA
Greyscale equivalent#848484
Inverted#E75A7F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A0997Eno red cones; affects about 1% of men; ΔE 42.4 from the original
Deuteranopia#908D83no green cones; the most common form, about 1% of men; ΔE 43.4 from the original
Tritanopia#00A69Bno blue cones; rare, and affects men and women equally; ΔE 15.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.12:1WCAG large text: AA
Contrast with black, large text6.73:1WCAG large text: AAA

Named colours

Sea green · ΔE 14.6Medium seagreen · ΔE 16.2Medium aquamarine · ΔE 16.3Light seagreen · ΔE 17.8Dark cyan · ΔE 24.2Turquoise · ΔE 24.7
Nearest named CSS colourSea green (#2E8B57)ΔE 14.58, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A5183D
Analogous#18A539, #1883A5
Triadic#8018A5, #A58018
Split complementary#A51883, #A53918
Tetradic#3A18A5, #A5183D, #84A518

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#99F0D9
Lighter +30%#6CEAC9
Lighter +20%#40E3B8
Lighter +10%#1ED2A3
Darker −10%#12785D
Darker −20%#0B4C3B
Darker −30%#051F18
Darker −40%#000000
More saturated +25%#00BD8B
Less saturated −25%#308D75

Channel breakdown

R24
G165
B128
Red24 (9.4%)
Green165 (64.7%)
Blue128 (50.2%)
Hue164.26°
Saturation (HSL)74.6%
Lightness37.06%
Dominant channelGreen
Hex per channelR 18 · G A5 · B 80

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Every value on this page was computed from “18a580” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.