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Recognised as Colour

#66CBB4

  • #66CBB4
  • Cyan
  • Dark
  • Nearest: Medium aquamarine

#66CBB4 is a cyan with RGB values 102, 203, 180 and HSL 166°, 49%, 60%. It is a dark colour, so black text on it reaches 10.8:1 contrast (AAA for normal text). The nearest named colour is Medium aquamarine.

Colour values

#66CBB4#66CBB4
HEX#66CBB4
RGBrgb(102, 203, 180)
RGB (0–1)0.4, 0.7961, 0.7059
RGB percentages40%, 79.6%, 70.6%
HSLhsl(166.3, 49.3%, 59.8%)
HSV / HSBhsv(166.3, 49.8%, 79.6%)
CMYK49.8%, 0%, 11.3%, 20.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,736,820
CSS custom property--colour: #66CBB4;

Brightness & contrast

Relative luminance0.48832WCAG 2.x, 0 is black and 1 is white
Perceived brightness176.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.77:1
Contrast with white1.95:1WCAG normal text: Fail
Contrast with black10.77:1WCAG normal text: AAA
Greyscale equivalent#B4B4B4
Inverted#99344B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#C5C0B3no red cones; affects about 1% of men; ΔE 35 from the original
Deuteranopia#B4B5B6no green cones; the most common form, about 1% of men; ΔE 35.1 from the original
Tritanopia#38CDC4no blue cones; rare, and affects men and women equally; ΔE 10.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.95:1WCAG large text: Fail
Contrast with black, large text10.77:1WCAG large text: AAA

Named colours

Medium aquamarine · ΔE 6.7Medium turquoise · ΔE 11.1Turquoise · ΔE 12.5Light seagreen · ΔE 13.2Dark turquoise · ΔE 16.7Dark seagreen · ΔE 19.5
Nearest named CSS colourMedium aquamarine (#66CDAA)ΔE 6.72, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CB667D
Analogous#66CB82, #66AFCB
Triadic#B466CB, #CBB466
Split complementary#CB66B0, #CB8266
Tetradic#8266CB, #CB667D, #B0CB66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FEFFFF
Lighter +30%#D8F2EC
Lighter +20%#B2E5D9
Lighter +10%#8CD8C7
Darker −10%#40BEA1
Darker −20%#339881
Darker −30%#277160
Darker −40%#1A4B40
More saturated +25%#4CE5C2
Less saturated −25%#80B1A6

Channel breakdown

R102
G203
B180
Red102 (40%)
Green203 (79.6%)
Blue180 (70.6%)
Hue166.34°
Saturation (HSL)49.27%
Lightness59.8%
Dominant channelGreen
Hex per channelR 66 · G CB · B B4

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Every value on this page was computed from “66cbb4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.