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Recognised as Colour

#178D47

  • #178D47
  • Green
  • Dark
  • Nearest: Sea green

#178D47 is a green with RGB values 23, 141, 71 and HSL 144°, 72%, 32%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Sea green.

Colour values

#178D47#178D47
HEX#178D47
RGBrgb(23, 141, 71)
RGB (0–1)0.0902, 0.5529, 0.2784
RGB percentages9%, 55.3%, 27.8%
HSLhsl(144.4, 72%, 32.2%)
HSV / HSBhsv(144.4, 83.7%, 55.3%)
CMYK83.7%, 0%, 49.6%, 44.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,543,495
CSS custom property--colour: #178D47;

Brightness & contrast

Relative luminance0.19687WCAG 2.x, 0 is black and 1 is white
Perceived brightness111.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.94:1
Contrast with white4.25:1WCAG normal text: Fail
Contrast with black4.94:1WCAG normal text: AA
Greyscale equivalent#6F6F6F
Inverted#E872B8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#8E8041no red cones; affects about 1% of men; ΔE 44.4 from the original
Deuteranopia#81774Cno green cones; the most common form, about 1% of men; ΔE 44.4 from the original
Tritanopia#008B7Dno blue cones; rare, and affects men and women equally; ΔE 32.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.25:1WCAG large text: AA
Contrast with black, large text4.94:1WCAG large text: AAA

Named colours

Sea green · ΔE 11.3Medium seagreen · ΔE 14.5Forest green · ΔE 16.6Dark green · ΔE 20.5Green · ΔE 22.4Olivedrab · ΔE 28.4
Nearest named CSS colourSea green (#2E8B57)ΔE 11.33, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8D175D
Analogous#228D17, #178D82
Triadic#47178D, #8D4717
Split complementary#82178D, #8D1722
Tetradic#17228D, #8D175D, #8D8217

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#85EBAE
Lighter +30%#59E492
Lighter +20%#2DDD75
Lighter +10%#1EB95D
Darker −10%#106131
Darker −20%#09351B
Darker −30%#020905
Darker −40%#000000
More saturated +25%#03A243
Less saturated −25%#2B794B

Channel breakdown

R23
G141
B71
Red23 (9%)
Green141 (55.3%)
Blue71 (27.8%)
Hue144.41°
Saturation (HSL)71.95%
Lightness32.16%
Dominant channelGreen
Hex per channelR 17 · G 8D · B 47

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Every value on this page was computed from “178d47” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.