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Recognised as Colour

#18A599

  • #18A599
  • Cyan
  • Dark
  • Nearest: Light seagreen

#18A599 is a cyan with RGB values 24, 165, 153 and HSL 175°, 75%, 37%. It is a dark colour, so black text on it reaches 6.9:1 contrast (AA for normal text). The nearest named colour is Light seagreen.

Colour values

#18A599#18A599
HEX#18A599
RGBrgb(24, 165, 153)
RGB (0–1)0.0941, 0.6471, 0.6
RGB percentages9.4%, 64.7%, 60%
HSLhsl(174.9, 74.6%, 37.1%)
HSV / HSBhsv(174.9, 85.5%, 64.7%)
CMYK85.5%, 0%, 7.3%, 35.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,615,257
CSS custom property--colour: #18A599;

Brightness & contrast

Relative luminance0.29404WCAG 2.x, 0 is black and 1 is white
Perceived brightness137.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.88:1
Contrast with white3.05:1WCAG normal text: Fail
Contrast with black6.88:1WCAG normal text: AA
Greyscale equivalent#868686
Inverted#E75A66

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#9C9B99no red cones; affects about 1% of men; ΔE 37.6 from the original
Deuteranopia#8A8E9Ano green cones; the most common form, about 1% of men; ΔE 38.4 from the original
Tritanopia#00A9A1no blue cones; rare, and affects men and women equally; ΔE 2.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.05:1WCAG large text: AA
Contrast with black, large text6.88:1WCAG large text: AAA

Named colours

Light seagreen · ΔE 5.3Dark cyan · ΔE 12.3Teal · ΔE 16.1Medium turquoise · ΔE 16.4Dark turquoise · ΔE 17.5Cadetblue · ΔE 17.9
Nearest named CSS colourLight seagreen (#20B2AA)ΔE 5.34, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A51824
Analogous#18A552, #186BA5
Triadic#9918A5, #A59918
Split complementary#A5186B, #A55218
Tetradic#5218A5, #A51824, #6BA518

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#99F0E9
Lighter +30%#6CEADF
Lighter +20%#40E3D5
Lighter +10%#1ED2C2
Darker −10%#127870
Darker −20%#0B4C46
Darker −30%#051F1D
Darker −40%#000000
More saturated +25%#00BDAD
Less saturated −25%#308D85

Channel breakdown

R24
G165
B153
Red24 (9.4%)
Green165 (64.7%)
Blue153 (60%)
Hue174.89°
Saturation (HSL)74.6%
Lightness37.06%
Dominant channelGreen
Hex per channelR 18 · G A5 · B 99

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Every value on this page was computed from “18a599” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.