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Recognised as Colour

#173B49

  • #173B49
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#173B49 is a cyan with RGB values 23, 59, 73 and HSL 197°, 52%, 19%. It is a dark colour, so white text on it reaches 11.9:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#173B49#173B49
HEX#173B49
RGBrgb(23, 59, 73)
RGB (0–1)0.0902, 0.2314, 0.2863
RGB percentages9%, 23.1%, 28.6%
HSLhsl(196.8, 52.1%, 18.8%)
HSV / HSBhsv(196.8, 68.5%, 28.6%)
CMYK68.5%, 19.2%, 0%, 71.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,522,505
CSS custom property--colour: #173B49;

Brightness & contrast

Relative luminance0.03791WCAG 2.x, 0 is black and 1 is white
Perceived brightness53 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.94:1
Contrast with white11.94:1WCAG normal text: AAA
Contrast with black1.76:1WCAG normal text: Fail
Greyscale equivalent#343434
Inverted#E8C4B6

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#333A4Ano red cones; affects about 1% of men; ΔE 9.6 from the original
Deuteranopia#2C3549no green cones; the most common form, about 1% of men; ΔE 10 from the original
Tritanopia#003F40no blue cones; rare, and affects men and women equally; ΔE 11.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.94:1WCAG large text: AAA
Contrast with black, large text1.76:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 12.6Dim grey · ΔE 26Black · ΔE 27.3Slate grey · ΔE 30.5Teal · ΔE 33.1Light slate grey · ΔE 33.5
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 12.62, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#492517
Analogous#17493E, #172249
Triadic#49173B, #3B4917
Split complementary#491722, #493E17
Tetradic#3E1749, #492517, #224917

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5FAECD
Lighter +30%#3C99BD
Lighter +20%#2F7A97
Lighter +10%#235A70
Darker −10%#0B1C22
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0B4055
Less saturated −25%#23363D

Channel breakdown

R23
G59
B73
Red23 (9%)
Green59 (23.1%)
Blue73 (28.6%)
Hue196.8°
Saturation (HSL)52.08%
Lightness18.82%
Dominant channelBlue
Hex per channelR 17 · G 3B · B 49

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Every value on this page was computed from “173b49” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.