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Recognised as Colour

#18A889

  • #18A889
  • Cyan
  • Dark
  • Nearest: Light seagreen

#18A889 is a cyan with RGB values 24, 168, 137 and HSL 167°, 75%, 38%. It is a dark colour, so black text on it reaches 7:1 contrast (AAA for normal text). The nearest named colour is Light seagreen.

Colour values

#18A889#18A889
HEX#18A889
RGBrgb(24, 168, 137)
RGB (0–1)0.0941, 0.6588, 0.5373
RGB percentages9.4%, 65.9%, 53.7%
HSLhsl(167.1, 75%, 37.6%)
HSV / HSBhsv(167.1, 85.7%, 65.9%)
CMYK85.7%, 0%, 18.5%, 34.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,616,009
CSS custom property--colour: #18A889;

Brightness & contrast

Relative luminance0.30006WCAG 2.x, 0 is black and 1 is white
Perceived brightness137.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7:1
Contrast with white3:1WCAG normal text: Fail
Contrast with black7:1WCAG normal text: AAA
Greyscale equivalent#878787
Inverted#E75776

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A29C88no red cones; affects about 1% of men; ΔE 42 from the original
Deuteranopia#91908Bno green cones; the most common form, about 1% of men; ΔE 42.5 from the original
Tritanopia#00AA9Fno blue cones; rare, and affects men and women equally; ΔE 11.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3:1WCAG large text: Fail
Contrast with black, large text7:1WCAG large text: AAA

Named colours

Light seagreen · ΔE 14.1Medium aquamarine · ΔE 14.9Sea green · ΔE 17.6Medium seagreen · ΔE 19.4Dark cyan · ΔE 21.6Medium turquoise · ΔE 21.7
Nearest named CSS colourLight seagreen (#20B2AA)ΔE 14.1, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A81837
Analogous#18A841, #187FA8
Triadic#8918A8, #A88918
Split complementary#A8187F, #A84118
Tetradic#4118A8, #A81837, #7FA818

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9BF1DE
Lighter +30%#6FEAD0
Lighter +20%#42E4C1
Lighter +10%#1ED5AD
Darker −10%#127B65
Darker −20%#0B4F40
Darker −30%#05221C
Darker −40%#000000
More saturated +25%#00C097
Less saturated −25%#30907B

Channel breakdown

R24
G168
B137
Red24 (9.4%)
Green168 (65.9%)
Blue137 (53.7%)
Hue167.08°
Saturation (HSL)75%
Lightness37.65%
Dominant channelGreen
Hex per channelR 18 · G A8 · B 89

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Every value on this page was computed from “18a889” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.