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Colour

#172A22

  • #172A22
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#172A22 is a cyan with RGB values 23, 42, 34 and HSL 155°, 29%, 13%. It is a dark colour, so white text on it reaches 15.1:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#172A22#172A22
HEX#172A22
RGBrgb(23, 42, 34)
RGB (0–1)0.0902, 0.1647, 0.1333
RGB percentages9%, 16.5%, 13.3%
HSLhsl(154.7, 29.2%, 12.7%)
HSV / HSBhsv(154.7, 45.2%, 16.5%)
CMYK45.2%, 0%, 19%, 83.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,518,114
CSS custom property--colour: #172A22;

Brightness & contrast

Relative luminance0.01954WCAG 2.x, 0 is black and 1 is white
Perceived brightness36.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.1:1
Contrast with white15.1:1WCAG normal text: AAA
Contrast with black1.39:1WCAG normal text: Fail
Greyscale equivalent#252525
Inverted#E8D5DD

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#292822no red cones; affects about 1% of men; ΔE 9.3 from the original
Deuteranopia#262522no green cones; the most common form, about 1% of men; ΔE 9.9 from the original
Tritanopia#122A28no blue cones; rare, and affects men and women equally; ΔE 4.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.1:1WCAG large text: AAA
Contrast with black, large text1.39:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 17.4Black · ΔE 18.5Dim grey · ΔE 31Teal · ΔE 39.6Dark olivegreen · ΔE 39.7Gray · ΔE 39.7
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 17.37, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#2A171F
Analogous#172A18, #17292A
Triadic#22172A, #2A2217
Split complementary#2A1729, #2A1817
Tetradic#18172A, #2A171F, #292A17

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#63AA8C
Lighter +30%#4D8D72
Lighter +20%#3B6C57
Lighter +10%#294B3D
Darker −10%#050907
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F3223
Less saturated −25%#1F2221

Channel breakdown

R23
G42
B34
Red23 (9%)
Green42 (16.5%)
Blue34 (13.3%)
Hue154.74°
Saturation (HSL)29.23%
Lightness12.75%
Dominant channelGreen
Hex per channelR 17 · G 2A · B 22

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Every value on this page was computed from “172a22” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.