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Colour

#18A388

  • #18A388
  • Cyan
  • Dark
  • Nearest: Light seagreen

#18A388 is a cyan with RGB values 24, 163, 136 and HSL 168°, 74%, 37%. It is a dark colour, so black text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Light seagreen.

Colour values

#18A388#18A388
HEX#18A388
RGBrgb(24, 163, 136)
RGB (0–1)0.0941, 0.6392, 0.5333
RGB percentages9.4%, 63.9%, 53.3%
HSLhsl(168.3, 74.3%, 36.7%)
HSV / HSBhsv(168.3, 85.3%, 63.9%)
CMYK85.3%, 0%, 16.6%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,614,728
CSS custom property--colour: #18A388;

Brightness & contrast

Relative luminance0.28166WCAG 2.x, 0 is black and 1 is white
Perceived brightness133.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.63:1
Contrast with white3.17:1WCAG normal text: Fail
Contrast with black6.63:1WCAG normal text: AA
Greyscale equivalent#838383
Inverted#E75C77

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#9D9887no red cones; affects about 1% of men; ΔE 40.3 from the original
Deuteranopia#8C8C8Ano green cones; the most common form, about 1% of men; ΔE 40.8 from the original
Tritanopia#00A59Bno blue cones; rare, and affects men and women equally; ΔE 9.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.17:1WCAG large text: AA
Contrast with black, large text6.63:1WCAG large text: AAA

Named colours

Light seagreen · ΔE 12.6Medium aquamarine · ΔE 16.4Sea green · ΔE 18Dark cyan · ΔE 18.6Teal · ΔE 21.2Medium turquoise · ΔE 21.4
Nearest named CSS colourLight seagreen (#20B2AA)ΔE 12.55, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A31833
Analogous#18A342, #1879A3
Triadic#8818A3, #A38818
Split complementary#A31879, #A34218
Tetradic#4218A3, #A31833, #79A318

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#97F0DF
Lighter +30%#6BE9D1
Lighter +20%#3EE3C3
Lighter +10%#1FCFAD
Darker −10%#117763
Darker −20%#0B4A3E
Darker −30%#041E19
Darker −40%#000000
More saturated +25%#01BA96
Less saturated −25%#2F8C7A

Channel breakdown

R24
G163
B136
Red24 (9.4%)
Green163 (63.9%)
Blue136 (53.3%)
Hue168.35°
Saturation (HSL)74.33%
Lightness36.67%
Dominant channelGreen
Hex per channelR 18 · G A3 · B 88

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Every value on this page was computed from “18a388” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.