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Recognised as Colour

#173B43

  • #173B43
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#173B43 is a cyan with RGB values 23, 59, 67 and HSL 191°, 49%, 18%. It is a dark colour, so white text on it reaches 12:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#173B43#173B43
HEX#173B43
RGBrgb(23, 59, 67)
RGB (0–1)0.0902, 0.2314, 0.2627
RGB percentages9%, 23.1%, 26.3%
HSLhsl(190.9, 48.9%, 17.6%)
HSV / HSBhsv(190.9, 65.7%, 26.3%)
CMYK65.7%, 11.9%, 0%, 73.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,522,499
CSS custom property--colour: #173B43;

Brightness & contrast

Relative luminance0.03715WCAG 2.x, 0 is black and 1 is white
Perceived brightness52.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.05:1
Contrast with white12.05:1WCAG normal text: AAA
Contrast with black1.74:1WCAG normal text: Fail
Greyscale equivalent#343434
Inverted#E8C4BC

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#353943no red cones; affects about 1% of men; ΔE 11.2 from the original
Deuteranopia#2F3443no green cones; the most common form, about 1% of men; ΔE 12.1 from the original
Tritanopia#003E3Dno blue cones; rare, and affects men and women equally; ΔE 8.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.05:1WCAG large text: AAA
Contrast with black, large text1.74:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 10.1Dim grey · ΔE 25.5Black · ΔE 26.4Slate grey · ΔE 31.2Teal · ΔE 31.7Gray · ΔE 33.7
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 10.09, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#431F17
Analogous#174335, #172543
Triadic#43173B, #3B4317
Split complementary#431725, #433517
Tetradic#351743, #431F17, #254317

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5EB5C8
Lighter +30%#3E9FB5
Lighter +20%#317E8F
Lighter +10%#245C69
Darker −10%#0A1A1D
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0C424E
Less saturated −25%#223438

Channel breakdown

R23
G59
B67
Red23 (9%)
Green59 (23.1%)
Blue67 (26.3%)
Hue190.91°
Saturation (HSL)48.89%
Lightness17.65%
Dominant channelBlue
Hex per channelR 17 · G 3B · B 43

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Every value on this page was computed from “173b43” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.