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Colour

#172D28

  • #172D28
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#172D28 is a cyan with RGB values 23, 45, 40 and HSL 166°, 32%, 13%. It is a dark colour, so white text on it reaches 14.6:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#172D28#172D28
HEX#172D28
RGBrgb(23, 45, 40)
RGB (0–1)0.0902, 0.1765, 0.1569
RGB percentages9%, 17.6%, 15.7%
HSLhsl(166.4, 32.4%, 13.3%)
HSV / HSBhsv(166.4, 48.9%, 17.6%)
CMYK48.9%, 0%, 11.1%, 82.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,518,888
CSS custom property--colour: #172D28;

Brightness & contrast

Relative luminance0.02212WCAG 2.x, 0 is black and 1 is white
Perceived brightness39.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.56:1
Contrast with white14.56:1WCAG normal text: AAA
Contrast with black1.44:1WCAG normal text: Fail
Greyscale equivalent#282828
Inverted#E8D2D7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2B2B28no red cones; affects about 1% of men; ΔE 9.7 from the original
Deuteranopia#282828no green cones; the most common form, about 1% of men; ΔE 10.3 from the original
Tritanopia#0F2E2Bno blue cones; rare, and affects men and women equally; ΔE 2.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.56:1WCAG large text: AAA
Contrast with black, large text1.44:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 15.4Black · ΔE 19.5Dim grey · ΔE 29.7Teal · ΔE 37.8Gray · ΔE 38.4Slate grey · ΔE 38.8
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 15.36, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#2D171C
Analogous#172D1D, #17272D
Triadic#28172D, #2D2817
Split complementary#2D1727, #2D1D17
Tetradic#1D172D, #2D171C, #272D17

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#61AF9D
Lighter +30%#4B9282
Lighter +20%#397164
Lighter +10%#284F46
Darker −10%#060B0A
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0E362D
Less saturated −25%#1F2523

Channel breakdown

R23
G45
B40
Red23 (9%)
Green45 (17.6%)
Blue40 (15.7%)
Hue166.36°
Saturation (HSL)32.35%
Lightness13.33%
Dominant channelGreen
Hex per channelR 17 · G 2D · B 28

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Every value on this page was computed from “172d28” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.