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Recognised as Colour

#66C1AB

  • #66C1AB
  • Cyan
  • Dark
  • Nearest: Medium aquamarine

#66C1AB is a cyan with RGB values 102, 193, 171 and HSL 165°, 42%, 58%. It is a dark colour, so black text on it reaches 9.8:1 contrast (AAA for normal text). The nearest named colour is Medium aquamarine.

Colour values

#66C1AB#66C1AB
HEX#66C1AB
RGBrgb(102, 193, 171)
RGB (0–1)0.4, 0.7569, 0.6706
RGB percentages40%, 75.7%, 67.1%
HSLhsl(165.5, 42.3%, 57.8%)
HSV / HSBhsv(165.5, 47.2%, 75.7%)
CMYK47.2%, 0%, 11.4%, 24.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,734,251
CSS custom property--colour: #66C1AB;

Brightness & contrast

Relative luminance0.43905WCAG 2.x, 0 is black and 1 is white
Perceived brightness168.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.78:1
Contrast with white2.15:1WCAG normal text: Fail
Contrast with black9.78:1WCAG normal text: AAA
Greyscale equivalent#ACACAC
Inverted#993E54

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#BBB7AAno red cones; affects about 1% of men; ΔE 32 from the original
Deuteranopia#ACACADno green cones; the most common form, about 1% of men; ΔE 32.9 from the original
Tritanopia#41C3BAno blue cones; rare, and affects men and women equally; ΔE 9.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.15:1WCAG large text: Fail
Contrast with black, large text9.78:1WCAG large text: AAA

Named colours

Medium aquamarine · ΔE 8.8Light seagreen · ΔE 12.1Medium turquoise · ΔE 12.9Turquoise · ΔE 16.2Dark seagreen · ΔE 17.7Dark turquoise · ΔE 18.1
Nearest named CSS colourMedium aquamarine (#66CDAA)ΔE 8.8, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C1667C
Analogous#66C17D, #66AAC1
Triadic#AB66C1, #C1AB66
Split complementary#C166AA, #C17D66
Tetradic#7D66C1, #C1667C, #AAC166

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F7FCFB
Lighter +30%#D3EDE7
Lighter +20%#AFDED3
Lighter +10%#8AD0BF
Darker −10%#46AE95
Darker −20%#388976
Darker −30%#296557
Darker −40%#1A4137
More saturated +25%#4BDCB9
Less saturated −25%#81A69D

Channel breakdown

R102
G193
B171
Red102 (40%)
Green193 (75.7%)
Blue171 (67.1%)
Hue165.49°
Saturation (HSL)42.33%
Lightness57.84%
Dominant channelGreen
Hex per channelR 66 · G C1 · B AB

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Every value on this page was computed from “66c1ab” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.