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Recognised as Colour

#21D6BC

  • #21D6BC
  • Cyan
  • Light
  • Nearest: Turquoise

#21D6BC is a cyan with RGB values 33, 214, 188 and HSL 171°, 73%, 48%. It is a light colour, so black text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Turquoise.

Colour values

#21D6BC#21D6BC
HEX#21D6BC
RGBrgb(33, 214, 188)
RGB (0–1)0.1294, 0.8392, 0.7373
RGB percentages12.9%, 83.9%, 73.7%
HSLhsl(171.4, 73.3%, 48.4%)
HSV / HSBhsv(171.4, 84.6%, 83.9%)
CMYK84.6%, 0%, 12.1%, 16.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,217,660
CSS custom property--colour: #21D6BC;

Brightness & contrast

Relative luminance0.52047WCAG 2.x, 0 is black and 1 is white
Perceived brightness176.7 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 11.41:1
Contrast with white1.84:1WCAG normal text: Fail
Contrast with black11.41:1WCAG normal text: AAA
Greyscale equivalent#AEAEAE
Inverted#DE2943

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#CCC8BBno red cones; affects about 1% of men; ΔE 47.8 from the original
Deuteranopia#B6B8BEno green cones; the most common form, about 1% of men; ΔE 48.8 from the original
Tritanopia#00DACEno blue cones; rare, and affects men and women equally; ΔE 7.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.84:1WCAG large text: Fail
Contrast with black, large text11.41:1WCAG large text: AAA

Named colours

Turquoise · ΔE 7.4Medium aquamarine · ΔE 12.5Medium turquoise · ΔE 14.1Dark turquoise · ΔE 16.6Light seagreen · ΔE 17.2Aquamarine · ΔE 17.4
Nearest named CSS colourTurquoise (#40E0D0)ΔE 7.44, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D6213B
Analogous#21D662, #2195D6
Triadic#BC21D6, #D6BC21
Split complementary#D62196, #D66221
Tetradic#6121D6, #D6213B, #95D621

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CCF7F1
Lighter +30%#A0F0E5
Lighter +20%#74E9D9
Lighter +10%#47E3CC
Darker −10%#1AAA95
Darker −20%#137E6E
Darker −30%#0D5148
Darker −40%#062521
More saturated +25%#02F5D2
Less saturated −25%#40B7A6

Channel breakdown

R33
G214
B188
Red33 (12.9%)
Green214 (83.9%)
Blue188 (73.7%)
Hue171.38°
Saturation (HSL)73.28%
Lightness48.43%
Dominant channelGreen
Hex per channelR 21 · G D6 · B BC

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Every value on this page was computed from “21d6bc” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.