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Recognised as Colour

#21CCB3

  • #21CCB3
  • Cyan
  • Dark
  • Nearest: Turquoise

#21CCB3 is a cyan with RGB values 33, 204, 179 and HSL 171°, 72%, 46%. It is a dark colour, so black text on it reaches 10.4:1 contrast (AAA for normal text). The nearest named colour is Turquoise.

Colour values

#21CCB3#21CCB3
HEX#21CCB3
RGBrgb(33, 204, 179)
RGB (0–1)0.1294, 0.8, 0.702
RGB percentages12.9%, 80%, 70.2%
HSLhsl(171.2, 72.2%, 46.5%)
HSV / HSBhsv(171.2, 83.8%, 80%)
CMYK83.8%, 0%, 12.3%, 20%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,215,091
CSS custom property--colour: #21CCB3;

Brightness & contrast

Relative luminance0.46764WCAG 2.x, 0 is black and 1 is white
Perceived brightness168.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.35:1
Contrast with white2.03:1WCAG normal text: Fail
Contrast with black10.35:1WCAG normal text: AAA
Greyscale equivalent#A6A6A6
Inverted#DE334C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#C3BFB2no red cones; affects about 1% of men; ΔE 46 from the original
Deuteranopia#AEB0B5no green cones; the most common form, about 1% of men; ΔE 46.8 from the original
Tritanopia#00D0C4no blue cones; rare, and affects men and women equally; ΔE 7.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.03:1WCAG large text: Fail
Contrast with black, large text10.35:1WCAG large text: AAA

Named colours

Turquoise · ΔE 9Medium aquamarine · ΔE 11Medium turquoise · ΔE 13.2Light seagreen · ΔE 14.1Dark turquoise · ΔE 15.7Aquamarine · ΔE 20.1
Nearest named CSS colourTurquoise (#40E0D0)ΔE 9.01, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CC213A
Analogous#21CC5D, #2190CC
Triadic#B321CC, #CCB321
Split complementary#CC2190, #CC5D21
Tetradic#5D21CC, #CC213A, #90CC21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C4F5EE
Lighter +30%#98EEE2
Lighter +20%#6CE7D5
Lighter +10%#40E0C9
Darker −10%#1AA08C
Darker −20%#137466
Darker −30%#0C483F
Darker −40%#051C19
More saturated +25%#03EAC8
Less saturated −25%#3FAE9E

Channel breakdown

R33
G204
B179
Red33 (12.9%)
Green204 (80%)
Blue179 (70.2%)
Hue171.23°
Saturation (HSL)72.15%
Lightness46.47%
Dominant channelGreen
Hex per channelR 21 · G CC · B B3

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Every value on this page was computed from “21ccb3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.