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Recognised as Colour

#66A990

  • #66A990
  • Cyan
  • Dark
  • Nearest: Dark seagreen

#66A990 is a cyan with RGB values 102, 169, 144 and HSL 158°, 28%, 53%. It is a dark colour, so black text on it reaches 7.6:1 contrast (AAA for normal text). The nearest named colour is Dark seagreen.

Colour values

#66A990#66A990
HEX#66A990
RGBrgb(102, 169, 144)
RGB (0–1)0.4, 0.6627, 0.5647
RGB percentages40%, 66.3%, 56.5%
HSLhsl(157.6, 28%, 53.1%)
HSV / HSBhsv(157.6, 39.6%, 66.3%)
CMYK39.6%, 0%, 14.8%, 33.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,728,080
CSS custom property--colour: #66A990;

Brightness & contrast

Relative luminance0.33214WCAG 2.x, 0 is black and 1 is white
Perceived brightness149.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.64:1
Contrast with white2.75:1WCAG normal text: Fail
Contrast with black7.64:1WCAG normal text: AAA
Greyscale equivalent#999999
Inverted#99566F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A6A18Fno red cones; affects about 1% of men; ΔE 26.2 from the original
Deuteranopia#9B9992no green cones; the most common form, about 1% of men; ΔE 26.7 from the original
Tritanopia#53AAA2no blue cones; rare, and affects men and women equally; ΔE 10.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.75:1WCAG large text: Fail
Contrast with black, large text7.64:1WCAG large text: AAA

Named colours

Dark seagreen · ΔE 14.5Cadetblue · ΔE 15.9Medium aquamarine · ΔE 16Light seagreen · ΔE 16.3Dark cyan · ΔE 19.8Medium turquoise · ΔE 21.8
Nearest named CSS colourDark seagreen (#8FBC8F)ΔE 14.51, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A9667F
Analogous#66A96F, #66A0A9
Triadic#9066A9, #A99066
Split complementary#A966A0, #A96F66
Tetradic#6F66A9, #A9667F, #A1A966

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E9F2EF
Lighter +30%#C8E0D7
Lighter +20%#A7CEBF
Lighter +10%#87BBA8
Darker −10%#4F8D76
Darker −20%#3D6C5B
Darker −30%#2A4C3F
Darker −40%#182B24
More saturated +25%#48C798
Less saturated −25%#848B88

Channel breakdown

R102
G169
B144
Red102 (40%)
Green169 (66.3%)
Blue144 (56.5%)
Hue157.61°
Saturation (HSL)28.03%
Lightness53.14%
Dominant channelGreen
Hex per channelR 66 · G A9 · B 90

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Every value on this page was computed from “66a990” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.