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Recognised as Colour

#21A682

  • #21A682
  • Cyan
  • Dark
  • Nearest: Sea green

#21A682 is a cyan with RGB values 33, 166, 130 and HSL 164°, 67%, 39%. It is a dark colour, so black text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Sea green.

Colour values

#21A682#21A682
HEX#21A682
RGBrgb(33, 166, 130)
RGB (0–1)0.1294, 0.651, 0.5098
RGB percentages12.9%, 65.1%, 51%
HSLhsl(163.8, 66.8%, 39%)
HSV / HSBhsv(163.8, 80.1%, 65.1%)
CMYK80.1%, 0%, 21.7%, 34.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,205,314
CSS custom property--colour: #21A682;

Brightness & contrast

Relative luminance0.29207WCAG 2.x, 0 is black and 1 is white
Perceived brightness135.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.84:1
Contrast with white3.07:1WCAG normal text: Fail
Contrast with black6.84:1WCAG normal text: AA
Greyscale equivalent#878787
Inverted#DE597D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A19A80no red cones; affects about 1% of men; ΔE 41.7 from the original
Deuteranopia#918E84no green cones; the most common form, about 1% of men; ΔE 42.5 from the original
Tritanopia#00A79Cno blue cones; rare, and affects men and women equally; ΔE 14.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.07:1WCAG large text: AA
Contrast with black, large text6.84:1WCAG large text: AAA

Named colours

Sea green · ΔE 14.9Medium aquamarine · ΔE 15.5Medium seagreen · ΔE 16.7Light seagreen · ΔE 17Dark cyan · ΔE 23.5Dark seagreen · ΔE 24
Nearest named CSS colourSea green (#2E8B57)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#A62145
Analogous#21A63F, #2188A6
Triadic#8221A6, #A68221
Split complementary#A62188, #A63F21
Tetradic#3F21A6, #A62145, #88A621

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A6EDDA
Lighter +30%#7BE5C8
Lighter +20%#51DCB7
Lighter +10%#29D1A3
Darker −10%#197B61
Darker −20%#10513F
Darker −30%#08261E
Darker −40%#000000
More saturated +25%#08BF8D
Less saturated −25%#3A8D77

Channel breakdown

R33
G166
B130
Red33 (12.9%)
Green166 (65.1%)
Blue130 (51%)
Hue163.76°
Saturation (HSL)66.83%
Lightness39.02%
Dominant channelGreen
Hex per channelR 21 · G A6 · B 82

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Every value on this page was computed from “21a682” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.