Nerdulator> put something in

Recognised as Colour

#66D8BF

  • #66D8BF
  • Cyan
  • Light
  • Nearest: Medium aquamarine

#66D8BF is a cyan with RGB values 102, 216, 191 and HSL 167°, 59%, 62%. It is a light colour, so black text on it reaches 12.1:1 contrast (AAA for normal text). The nearest named colour is Medium aquamarine.

Colour values

#66D8BF#66D8BF
HEX#66D8BF
RGBrgb(102, 216, 191)
RGB (0–1)0.4, 0.8471, 0.749
RGB percentages40%, 84.7%, 74.9%
HSLhsl(166.8, 59.4%, 62.4%)
HSV / HSBhsv(166.8, 52.8%, 84.7%)
CMYK52.8%, 0%, 11.6%, 15.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,740,159
CSS custom property--colour: #66D8BF;

Brightness & contrast

Relative luminance0.55698WCAG 2.x, 0 is black and 1 is white
Perceived brightness186.2 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 12.14:1
Contrast with white1.73:1WCAG normal text: Fail
Contrast with black12.14:1WCAG normal text: AAA
Greyscale equivalent#BEBEBE
Inverted#992740

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#D1CCBEno red cones; affects about 1% of men; ΔE 38.2 from the original
Deuteranopia#BFBFC1no green cones; the most common form, about 1% of men; ΔE 39 from the original
Tritanopia#28DBD0no blue cones; rare, and affects men and women equally; ΔE 10.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.73:1WCAG large text: Fail
Contrast with black, large text12.14:1WCAG large text: AAA

Named colours

Medium aquamarine · ΔE 6.9Turquoise · ΔE 8.8Medium turquoise · ΔE 11.2Aquamarine · ΔE 16.2Light seagreen · ΔE 16.3Dark turquoise · ΔE 16.6
Nearest named CSS colourMedium aquamarine (#66CDAA)ΔE 6.94, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D8667F
Analogous#66D886, #66B8D8
Triadic#BF66D8, #D8BF66
Split complementary#D866B8, #D88666
Tetradic#8666D8, #D8667F, #B8D866

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E0F7F2
Lighter +20%#B7EDE1
Lighter +10%#8FE2D0
Darker −10%#3DCEAE
Darker −20%#2CAC90
Darker −30%#22836E
Darker −40%#175B4C
More saturated +25%#4EF0CC
Less saturated −25%#7EC0B2

Channel breakdown

R102
G216
B191
Red102 (40%)
Green216 (84.7%)
Blue191 (74.9%)
Hue166.84°
Saturation (HSL)59.38%
Lightness62.35%
Dominant channelGreen
Hex per channelR 66 · G D8 · B BF

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Nerdulate something else

Nothing in mind? Surprise me · today’s page

Every value on this page was computed from “66d8bf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.