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Colour

#21A66F

  • #21A66F
  • Cyan
  • Dark
  • Nearest: Medium seagreen

#21A66F is a cyan with RGB values 33, 166, 111 and HSL 155°, 67%, 39%. It is a dark colour, so black text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Medium seagreen.

Colour values

#21A66F#21A66F
HEX#21A66F
RGBrgb(33, 166, 111)
RGB (0–1)0.1294, 0.651, 0.4353
RGB percentages12.9%, 65.1%, 43.5%
HSLhsl(155.2, 66.8%, 39%)
HSV / HSBhsv(155.2, 80.1%, 65.1%)
CMYK80.1%, 0%, 33.1%, 34.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,205,295
CSS custom property--colour: #21A66F;

Brightness & contrast

Relative luminance0.28743WCAG 2.x, 0 is black and 1 is white
Perceived brightness133.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.75:1
Contrast with white3.11:1WCAG normal text: Fail
Contrast with black6.75:1WCAG normal text: AA
Greyscale equivalent#868686
Inverted#DE5990

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A4996Cno red cones; affects about 1% of men; ΔE 45.1 from the original
Deuteranopia#948D73no green cones; the most common form, about 1% of men; ΔE 45.9 from the original
Tritanopia#00A598no blue cones; rare, and affects men and women equally; ΔE 24.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.11:1WCAG large text: AA
Contrast with black, large text6.75:1WCAG large text: AAA

Named colours

Medium seagreen · ΔE 7.2Sea green · ΔE 12Medium aquamarine · ΔE 20.6Dark seagreen · ΔE 26.4Light seagreen · ΔE 27.7Forest green · ΔE 28
Nearest named CSS colourMedium seagreen (#3CB371)ΔE 7.19, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A62158
Analogous#21A62C, #219BA6
Triadic#6F21A6, #A66F21
Split complementary#A6219B, #A62C21
Tetradic#2D21A6, #A62158, #9BA621

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A6EDD0
Lighter +30%#7BE5B9
Lighter +20%#51DCA3
Lighter +10%#29D18B
Darker −10%#197B53
Darker −20%#105136
Darker −30%#08261A
Darker −40%#000000
More saturated +25%#08BF73
Less saturated −25%#3A8D6B

Channel breakdown

R33
G166
B111
Red33 (12.9%)
Green166 (65.1%)
Blue111 (43.5%)
Hue155.19°
Saturation (HSL)66.83%
Lightness39.02%
Dominant channelGreen
Hex per channelR 21 · G A6 · B 6F

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Every value on this page was computed from “21a66f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.