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Recognised as Colour

#21813F

  • #21813F
  • Green
  • Dark
  • Nearest: Sea green

#21813F is a green with RGB values 33, 129, 63 and HSL 139°, 59%, 32%. It is a dark colour, so white text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Sea green.

Colour values

#21813F#21813F
HEX#21813F
RGBrgb(33, 129, 63)
RGB (0–1)0.1294, 0.5059, 0.2471
RGB percentages12.9%, 50.6%, 24.7%
HSLhsl(138.8, 59.3%, 31.8%)
HSV / HSBhsv(138.8, 74.4%, 50.6%)
CMYK74.4%, 0%, 51.2%, 49.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,195,775
CSS custom property--colour: #21813F;

Brightness & contrast

Relative luminance0.16383WCAG 2.x, 0 is black and 1 is white
Perceived brightness102.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.91:1
Contrast with white4.91:1WCAG normal text: AA
Contrast with black4.28:1WCAG normal text: Fail
Greyscale equivalent#686868
Inverted#DE7EC0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#82753Ano red cones; affects about 1% of men; ΔE 39.9 from the original
Deuteranopia#776D44no green cones; the most common form, about 1% of men; ΔE 40.3 from the original
Tritanopia#007F72no blue cones; rare, and affects men and women equally; ΔE 30.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.91:1WCAG large text: AAA
Contrast with black, large text4.28:1WCAG large text: AA

Named colours

Sea green · ΔE 9.3Dark green · ΔE 17.9Forest green · ΔE 18.7Medium seagreen · ΔE 19Green · ΔE 23.8Dark olivegreen · ΔE 24.5
Nearest named CSS colourSea green (#2E8B57)ΔE 9.31, clearly different but related
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#812163
Analogous#338121, #21816F
Triadic#3F2181, #813F21
Split complementary#6F2181, #812133
Tetradic#213381, #812163, #816F21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8CE2A7
Lighter +30%#64D788
Lighter +20%#3BCD69
Lighter +10%#2BAA53
Darker −10%#17582B
Darker −20%#0C3017
Darker −30%#020703
Darker −40%#000000
More saturated +25%#0D9537
Less saturated −25%#356D47

Channel breakdown

R33
G129
B63
Red33 (12.9%)
Green129 (50.6%)
Blue63 (24.7%)
Hue138.75°
Saturation (HSL)59.26%
Lightness31.76%
Dominant channelGreen
Hex per channelR 21 · G 81 · B 3F

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Every value on this page was computed from “21813f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.