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Recognised as Colour

#1D373A

  • #1D373A
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#1D373A is a cyan with RGB values 29, 55, 58 and HSL 186°, 33%, 17%. It is a dark colour, so white text on it reaches 12.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1D373A#1D373A
HEX#1D373A
RGBrgb(29, 55, 58)
RGB (0–1)0.1137, 0.2157, 0.2275
RGB percentages11.4%, 21.6%, 22.7%
HSLhsl(186.2, 33.3%, 17.1%)
HSV / HSBhsv(186.2, 50%, 22.7%)
CMYK50%, 5.2%, 0%, 77.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,914,682
CSS custom property--colour: #1D373A;

Brightness & contrast

Relative luminance0.03299WCAG 2.x, 0 is black and 1 is white
Perceived brightness49.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.65:1
Contrast with white12.65:1WCAG normal text: AAA
Contrast with black1.66:1WCAG normal text: Fail
Greyscale equivalent#323232
Inverted#E2C8C5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#33353Ano red cones; affects about 1% of men; ΔE 9.5 from the original
Deuteranopia#2E313Ano green cones; the most common form, about 1% of men; ΔE 10.1 from the original
Tritanopia#0F3938no blue cones; rare, and affects men and women equally; ΔE 5.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.65:1WCAG large text: AAA
Contrast with black, large text1.66:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 10.5Black · ΔE 23.6Dim grey · ΔE 25.4Slate grey · ΔE 32.8Teal · ΔE 33.7Gray · ΔE 34
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 10.49, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3A201D
Analogous#1D3A2F, #1D283A
Triadic#3A1D37, #373A1D
Split complementary#3A1D28, #3A2F1D
Tetradic#2F1D3A, #3A201D, #293A1D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6DAEB6
Lighter +30%#5098A0
Lighter +20%#3F777E
Lighter +10%#2E575C
Darker −10%#0C1718
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#124045
Less saturated −25%#282E2F

Channel breakdown

R29
G55
B58
Red29 (11.4%)
Green55 (21.6%)
Blue58 (22.7%)
Hue186.21°
Saturation (HSL)33.33%
Lightness17.06%
Dominant channelBlue
Hex per channelR 1D · G 37 · B 3A

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Every value on this page was computed from “1d373a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.