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Recognised as Colour

#178F65

  • #178F65
  • Cyan
  • Dark
  • Nearest: Sea green

#178F65 is a cyan with RGB values 23, 143, 101 and HSL 159°, 72%, 33%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Sea green.

Colour values

#178F65#178F65
HEX#178F65
RGBrgb(23, 143, 101)
RGB (0–1)0.0902, 0.5608, 0.3961
RGB percentages9%, 56.1%, 39.6%
HSLhsl(159, 72.3%, 32.5%)
HSV / HSBhsv(159, 83.9%, 56.1%)
CMYK83.9%, 0%, 29.4%, 43.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,544,037
CSS custom property--colour: #178F65;

Brightness & contrast

Relative luminance0.20767WCAG 2.x, 0 is black and 1 is white
Perceived brightness115.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.15:1
Contrast with white4.08:1WCAG normal text: Fail
Contrast with black5.15:1WCAG normal text: AA
Greyscale equivalent#727272
Inverted#E8709A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#8C8463no red cones; affects about 1% of men; ΔE 39.6 from the original
Deuteranopia#7E7A68no green cones; the most common form, about 1% of men; ΔE 40.1 from the original
Tritanopia#008F84no blue cones; rare, and affects men and women equally; ΔE 18.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.08:1WCAG large text: AA
Contrast with black, large text5.15:1WCAG large text: AAA

Named colours

Sea green · ΔE 6.8Medium seagreen · ΔE 17.7Medium aquamarine · ΔE 23.8Light seagreen · ΔE 24.2Dark cyan · ΔE 25.2Teal · ΔE 26
Nearest named CSS colourSea green (#2E8B57)ΔE 6.79, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8F1741
Analogous#178F29, #177D8F
Triadic#65178F, #8F6517
Split complementary#8F177D, #8F2917
Tetradic#29178F, #8F1741, #7D8F17

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#86ECC8
Lighter +30%#5AE5B4
Lighter +20%#2FDDA0
Lighter +10%#1EBB84
Darker −10%#106346
Darker −20%#093727
Darker −30%#020B08
Darker −40%#000000
More saturated +25%#02A46B
Less saturated −25%#2C7A5F

Channel breakdown

R23
G143
B101
Red23 (9%)
Green143 (56.1%)
Blue101 (39.6%)
Hue159°
Saturation (HSL)72.29%
Lightness32.55%
Dominant channelGreen
Hex per channelR 17 · G 8F · B 65

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Every value on this page was computed from “178f65” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.