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Recognised as Colour

#21DFC9

  • #21DFC9
  • Cyan
  • Light
  • Nearest: Turquoise

#21DFC9 is a cyan with RGB values 33, 223, 201 and HSL 173°, 75%, 50%. It is a light colour, so black text on it reaches 12.5:1 contrast (AAA for normal text). The nearest named colour is Turquoise.

Colour values

#21DFC9#21DFC9
HEX#21DFC9
RGBrgb(33, 223, 201)
RGB (0–1)0.1294, 0.8745, 0.7882
RGB percentages12.9%, 87.5%, 78.8%
HSLhsl(173.1, 74.8%, 50.2%)
HSV / HSBhsv(173.1, 85.2%, 87.5%)
CMYK85.2%, 0%, 9.9%, 12.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,219,977
CSS custom property--colour: #21DFC9;

Brightness & contrast

Relative luminance0.57316WCAG 2.x, 0 is black and 1 is white
Perceived brightness184.7 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 12.46:1
Contrast with white1.68:1WCAG normal text: Fail
Contrast with black12.46:1WCAG normal text: AAA
Greyscale equivalent#B5B5B5
Inverted#DE2036

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#D4D1C8no red cones; affects about 1% of men; ΔE 48.4 from the original
Deuteranopia#BDC0CBno green cones; the most common form, about 1% of men; ΔE 49.7 from the original
Tritanopia#00E3D8no blue cones; rare, and affects men and women equally; ΔE 6.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.68:1WCAG large text: Fail
Contrast with black, large text12.46:1WCAG large text: AAA

Named colours

Turquoise · ΔE 5Medium turquoise · ΔE 13.4Medium aquamarine · ΔE 15Dark turquoise · ΔE 15.4Aqua · ΔE 16.4Cyan · ΔE 16.4
Nearest named CSS colourTurquoise (#40E0D0)ΔE 5.02, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DF2137
Analogous#21DF6A, #2196DF
Triadic#C921DF, #DFC921
Split complementary#DF2196, #DF6A21
Tetradic#6A21DF, #DF2137, #96DF21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D3F9F4
Lighter +30%#A7F2EA
Lighter +20%#7AECDF
Lighter +10%#4EE5D4
Darker −10%#1AB3A1
Darker −20%#138779
Darker −30%#0D5A51
Darker −40%#072D29
More saturated +25%#01FFE1
Less saturated −25%#41BFB1

Channel breakdown

R33
G223
B201
Red33 (12.9%)
Green223 (87.5%)
Blue201 (78.8%)
Hue173.05°
Saturation (HSL)74.8%
Lightness50.2%
Dominant channelGreen
Hex per channelR 21 · G DF · B C9

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Every value on this page was computed from “21dfc9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.