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Recognised as Colour

#21580D

  • #21580D
  • Green
  • Dark
  • Nearest: Dark green

#21580D is a green with RGB values 33, 88, 13 and HSL 104°, 74%, 20%. It is a dark colour, so white text on it reaches 8.5:1 contrast (AAA for normal text). The nearest named colour is Dark green.

Colour values

#21580D#21580D
HEX#21580D
RGBrgb(33, 88, 13)
RGB (0–1)0.1294, 0.3451, 0.051
RGB percentages12.9%, 34.5%, 5.1%
HSLhsl(104, 74.3%, 19.8%)
HSV / HSBhsv(104, 85.2%, 34.5%)
CMYK62.5%, 0%, 85.2%, 65.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,185,229
CSS custom property--colour: #21580D;

Brightness & contrast

Relative luminance0.07332WCAG 2.x, 0 is black and 1 is white
Perceived brightness69.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.51:1
Contrast with white8.51:1WCAG normal text: AAA
Contrast with black2.47:1WCAG normal text: Fail
Greyscale equivalent#474747
Inverted#DEA7F2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5B4F00no red cones; affects about 1% of men; ΔE 30.3 from the original
Deuteranopia#544B16no green cones; the most common form, about 1% of men; ΔE 29.6 from the original
Tritanopia#1B554Ano blue cones; rare, and affects men and women equally; ΔE 35.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.51:1WCAG large text: AAA
Contrast with black, large text2.47:1WCAG large text: Fail

Named colours

Dark green · ΔE 13.3Dark olivegreen · ΔE 17.4Sea green · ΔE 25.2Forest green · ΔE 26.7Olivedrab · ΔE 26.9Green · ΔE 27.8
Nearest named CSS colourDark green (#006400)ΔE 13.26, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#440D58
Analogous#47580D, #0D581F
Triadic#0D2158, #580D21
Split complementary#1F0D58, #580D47
Tetradic#0D4758, #440D58, #581F0D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#75E54C
Lighter +30%#53DD21
Lighter +20%#42B11A
Lighter +10%#328414
Darker −10%#102C06
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1B6500
Less saturated −25%#274B1A

Channel breakdown

R33
G88
B13
Red33 (12.9%)
Green88 (34.5%)
Blue13 (5.1%)
Hue104°
Saturation (HSL)74.26%
Lightness19.8%
Dominant channelGreen
Hex per channelR 21 · G 58 · B 0D

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Every value on this page was computed from “21580d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.