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Recognised as Colour

#66BCAB

  • #66BCAB
  • Cyan
  • Dark
  • Nearest: Light seagreen

#66BCAB is a cyan with RGB values 102, 188, 171 and HSL 168°, 39%, 57%. It is a dark colour, so black text on it reaches 9.3:1 contrast (AAA for normal text). The nearest named colour is Light seagreen.

Colour values

#66BCAB#66BCAB
HEX#66BCAB
RGBrgb(102, 188, 171)
RGB (0–1)0.4, 0.7373, 0.6706
RGB percentages40%, 73.7%, 67.1%
HSLhsl(168.1, 39.1%, 56.9%)
HSV / HSBhsv(168.1, 45.7%, 73.7%)
CMYK45.7%, 0%, 9%, 26.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,732,971
CSS custom property--colour: #66BCAB;

Brightness & contrast

Relative luminance0.41731WCAG 2.x, 0 is black and 1 is white
Perceived brightness164.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.35:1
Contrast with white2.25:1WCAG normal text: Fail
Contrast with black9.35:1WCAG normal text: AAA
Greyscale equivalent#A8A8A8
Inverted#994354

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#B6B3AAno red cones; affects about 1% of men; ΔE 30 from the original
Deuteranopia#A7A9ACno green cones; the most common form, about 1% of men; ΔE 30.2 from the original
Tritanopia#43BEB7no blue cones; rare, and affects men and women equally; ΔE 8.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.25:1WCAG large text: Fail
Contrast with black, large text9.35:1WCAG large text: AAA

Named colours

Light seagreen · ΔE 11.2Medium aquamarine · ΔE 12.3Medium turquoise · ΔE 13Cadetblue · ΔE 16.3Dark turquoise · ΔE 17.8Turquoise · ΔE 18.1
Nearest named CSS colourLight seagreen (#20B2AA)ΔE 11.19, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BC6677
Analogous#66BC80, #66A2BC
Triadic#AB66BC, #BCAB66
Split complementary#BC66A2, #BC8066
Tetradic#8066BC, #BC6677, #A2BC66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F4FAF9
Lighter +30%#D0EBE5
Lighter +20%#ADDBD2
Lighter +10%#89CCBE
Darker −10%#49A694
Darker −20%#398374
Darker −30%#2A5F55
Darker −40%#1A3C35
More saturated +25%#4AD8BC
Less saturated −25%#82A19A

Channel breakdown

R102
G188
B171
Red102 (40%)
Green188 (73.7%)
Blue171 (67.1%)
Hue168.14°
Saturation (HSL)39.09%
Lightness56.86%
Dominant channelGreen
Hex per channelR 66 · G BC · B AB

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