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Recognised as Colour

#1D3733

  • #1D3733
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#1D3733 is a cyan with RGB values 29, 55, 51 and HSL 171°, 31%, 16%. It is a dark colour, so white text on it reaches 12.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1D3733#1D3733
HEX#1D3733
RGBrgb(29, 55, 51)
RGB (0–1)0.1137, 0.2157, 0.2
RGB percentages11.4%, 21.6%, 20%
HSLhsl(170.8, 31%, 16.5%)
HSV / HSBhsv(170.8, 47.3%, 21.6%)
CMYK47.3%, 0%, 7.3%, 78.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,914,675
CSS custom property--colour: #1D3733;

Brightness & contrast

Relative luminance0.03233WCAG 2.x, 0 is black and 1 is white
Perceived brightness48.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.75:1
Contrast with white12.75:1WCAG normal text: AAA
Contrast with black1.65:1WCAG normal text: Fail
Greyscale equivalent#313131
Inverted#E2C8CC

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#353433no red cones; affects about 1% of men; ΔE 11.5 from the original
Deuteranopia#303133no green cones; the most common form, about 1% of men; ΔE 11.3 from the original
Tritanopia#133836no blue cones; rare, and affects men and women equally; ΔE 3.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.75:1WCAG large text: AAA
Contrast with black, large text1.65:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 10.8Black · ΔE 23.8Dim grey · ΔE 26Teal · ΔE 33.5Gray · ΔE 34.5Slate grey · ΔE 34.6
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 10.77, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#371D21
Analogous#1D3726, #1D2E37
Triadic#331D37, #37331D
Split complementary#371D2E, #37261D
Tetradic#261D37, #371D21, #2E371D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6EB2A8
Lighter +30%#529B90
Lighter +20%#407A71
Lighter +10%#2F5852
Darker −10%#0B1614
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#12423A
Less saturated −25%#272D2C

Channel breakdown

R29
G55
B51
Red29 (11.4%)
Green55 (21.6%)
Blue51 (20%)
Hue170.77°
Saturation (HSL)30.95%
Lightness16.47%
Dominant channelGreen
Hex per channelR 1D · G 37 · B 33

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Every value on this page was computed from “1d3733” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.