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Recognised as Colour

#18A8A8

  • #18A8A8
  • Cyan
  • Dark
  • Nearest: Light seagreen

#18A8A8 is a cyan with RGB values 24, 168, 168 and HSL 180°, 75%, 38%. It is a dark colour, so black text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Light seagreen.

Colour values

#18A8A8#18A8A8
HEX#18A8A8
RGBrgb(24, 168, 168)
RGB (0–1)0.0941, 0.6588, 0.6588
RGB percentages9.4%, 65.9%, 65.9%
HSLhsl(180, 75%, 37.6%)
HSV / HSBhsv(180, 85.7%, 65.9%)
CMYK85.7%, 0%, 0%, 34.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,616,040
CSS custom property--colour: #18A8A8;

Brightness & contrast

Relative luminance0.31027WCAG 2.x, 0 is black and 1 is white
Perceived brightness141.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.21:1
Contrast with white2.91:1WCAG normal text: Fail
Contrast with black7.21:1WCAG normal text: AAA
Greyscale equivalent#898989
Inverted#E75757

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#9C9FA8no red cones; affects about 1% of men; ΔE 35.3 from the original
Deuteranopia#8991A9no green cones; the most common form, about 1% of men; ΔE 36.7 from the original
Tritanopia#00AEA8no blue cones; rare, and affects men and women equally; ΔE 4.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.91:1WCAG large text: Fail
Contrast with black, large text7.21:1WCAG large text: AAA

Named colours

Light seagreen · ΔE 6Dark cyan · ΔE 10.9Dark turquoise · ΔE 14.5Cadetblue · ΔE 14.7Medium turquoise · ΔE 14.8Teal · ΔE 15.3
Nearest named CSS colourLight seagreen (#20B2AA)ΔE 6.03, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A81818
Analogous#18A860, #1860A8
Triadic#A818A8, #A8A818
Split complementary#A81860, #A86018
Tetradic#6018A8, #A81818, #60A818

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9BF1F1
Lighter +30%#6FEAEA
Lighter +20%#42E4E4
Lighter +10%#1ED5D5
Darker −10%#127B7B
Darker −20%#0B4F4F
Darker −30%#052222
Darker −40%#000000
More saturated +25%#00C0C0
Less saturated −25%#309090

Channel breakdown

R24
G168
B168
Red24 (9.4%)
Green168 (65.9%)
Blue168 (65.9%)
Hue180°
Saturation (HSL)75%
Lightness37.65%
Dominant channelGreen and Blue
Hex per channelR 18 · G A8 · B A8

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Every value on this page was computed from “18a8a8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.