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Recognised as Colour

#18D5DF

  • #18D5DF
  • Cyan
  • Light
  • Nearest: Dark turquoise

#18D5DF is a cyan with RGB values 24, 213, 223 and HSL 183°, 81%, 48%. It is a light colour, so black text on it reaches 11.6:1 contrast (AAA for normal text). The nearest named colour is Dark turquoise.

Colour values

#18D5DF#18D5DF
HEX#18D5DF
RGBrgb(24, 213, 223)
RGB (0–1)0.0941, 0.8353, 0.8745
RGB percentages9.4%, 83.5%, 87.5%
HSLhsl(183, 80.6%, 48.4%)
HSV / HSBhsv(183, 89.2%, 87.5%)
CMYK89.2%, 4.5%, 0%, 12.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,627,615
CSS custom property--colour: #18D5DF;

Brightness & contrast

Relative luminance0.5311WCAG 2.x, 0 is black and 1 is white
Perceived brightness180.2 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 11.62:1
Contrast with white1.81:1WCAG normal text: Fail
Contrast with black11.62:1WCAG normal text: AAA
Greyscale equivalent#AEAEAE
Inverted#E72A20

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#C4CBE0no red cones; affects about 1% of men; ΔE 40.6 from the original
Deuteranopia#ABB9E0no green cones; the most common form, about 1% of men; ΔE 42.1 from the original
Tritanopia#00DED8no blue cones; rare, and affects men and women equally; ΔE 10.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.81:1WCAG large text: Fail
Contrast with black, large text11.62:1WCAG large text: AAA

Named colours

Dark turquoise · ΔE 4.8Medium turquoise · ΔE 8.8Turquoise · ΔE 14.7Light seagreen · ΔE 16.2Aqua · ΔE 16.7Cyan · ΔE 16.7
Nearest named CSS colourDark turquoise (#00CED1)ΔE 4.77, a close match
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DF2218
Analogous#18DF85, #1872DF
Triadic#DF18D5, #D5DF18
Split complementary#DF1872, #DF8518
Tetradic#8518DF, #DF2218, #72DF18

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CAF7F9
Lighter +30%#9CF0F4
Lighter +20%#6EE9EF
Lighter +10%#40E2EA
Darker −10%#13A9B1
Darker −20%#0E7D83
Darker −30%#095155
Darker −40%#042527
More saturated +25%#00EBF7
Less saturated −25%#37B9C0

Channel breakdown

R24
G213
B223
Red24 (9.4%)
Green213 (83.5%)
Blue223 (87.5%)
Hue183.02°
Saturation (HSL)80.57%
Lightness48.43%
Dominant channelBlue
Hex per channelR 18 · G D5 · B DF

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Every value on this page was computed from “18d5df” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.