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Recognised as Colour

#21DFB3

  • #21DFB3
  • Cyan
  • Light
  • Nearest: Aquamarine

#21DFB3 is a cyan with RGB values 33, 223, 179 and HSL 166°, 75%, 50%. It is a light colour, so black text on it reaches 12.3:1 contrast (AAA for normal text). The nearest named colour is Aquamarine.

Colour values

#21DFB3#21DFB3
HEX#21DFB3
RGBrgb(33, 223, 179)
RGB (0–1)0.1294, 0.8745, 0.702
RGB percentages12.9%, 87.5%, 70.2%
HSLhsl(166.1, 74.8%, 50.2%)
HSV / HSBhsv(166.1, 85.2%, 87.5%)
CMYK85.2%, 0%, 19.7%, 12.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,219,955
CSS custom property--colour: #21DFB3;

Brightness & contrast

Relative luminance0.56353WCAG 2.x, 0 is black and 1 is white
Perceived brightness182.1 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 12.27:1
Contrast with white1.71:1WCAG normal text: Fail
Contrast with black12.27:1WCAG normal text: AAA
Greyscale equivalent#B3B3B3
Inverted#DE204C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#D8CFB1no red cones; affects about 1% of men; ΔE 52.9 from the original
Deuteranopia#C2BFB6no green cones; the most common form, about 1% of men; ΔE 53.8 from the original
Tritanopia#00E1D2no blue cones; rare, and affects men and women equally; ΔE 16 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.71:1WCAG large text: Fail
Contrast with black, large text12.27:1WCAG large text: AAA

Named colours

Aquamarine · ΔE 14.9Medium aquamarine · ΔE 16.3Turquoise · ΔE 16.7Medium seagreen · ΔE 21.8Medium turquoise · ΔE 24.4Aqua · ΔE 26.6
Nearest named CSS colourAquamarine (#7FFFD4)ΔE 14.94, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DF214D
Analogous#21DF54, #21ACDF
Triadic#B321DF, #DFB321
Split complementary#DF21AC, #DF5421
Tetradic#5421DF, #DF214D, #ACDF21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D3F9F0
Lighter +30%#A7F2E1
Lighter +20%#7AECD2
Lighter +10%#4EE5C2
Darker −10%#1AB390
Darker −20%#13876C
Darker −30%#0D5A48
Darker −40%#072D24
More saturated +25%#01FFC4
Less saturated −25%#41BFA2

Channel breakdown

R33
G223
B179
Red33 (12.9%)
Green223 (87.5%)
Blue179 (70.2%)
Hue166.11°
Saturation (HSL)74.8%
Lightness50.2%
Dominant channelGreen
Hex per channelR 21 · G DF · B B3

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Every value on this page was computed from “21dfb3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.