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Recognised as Colour

#1D3537

  • #1D3537
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#1D3537 is a cyan with RGB values 29, 53, 55 and HSL 185°, 31%, 16%. It is a dark colour, so white text on it reaches 13:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1D3537#1D3537
HEX#1D3537
RGBrgb(29, 53, 55)
RGB (0–1)0.1137, 0.2078, 0.2157
RGB percentages11.4%, 20.8%, 21.6%
HSLhsl(184.6, 31%, 16.5%)
HSV / HSBhsv(184.6, 47.3%, 21.6%)
CMYK47.3%, 3.6%, 0%, 78.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,914,167
CSS custom property--colour: #1D3537;

Brightness & contrast

Relative luminance0.03083WCAG 2.x, 0 is black and 1 is white
Perceived brightness47.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.99:1
Contrast with white12.99:1WCAG normal text: AAA
Contrast with black1.62:1WCAG normal text: Fail
Greyscale equivalent#303030
Inverted#E2CAC8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#323337no red cones; affects about 1% of men; ΔE 9.4 from the original
Deuteranopia#2D3037no green cones; the most common form, about 1% of men; ΔE 9.2 from the original
Tritanopia#123736no blue cones; rare, and affects men and women equally; ΔE 4.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.99:1WCAG large text: AAA
Contrast with black, large text1.62:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 11.3Black · ΔE 22.5Dim grey · ΔE 25.9Slate grey · ΔE 33.7Gray · ΔE 34.6Teal · ΔE 34.7
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 11.3, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#371F1D
Analogous#1D372C, #1D2837
Triadic#371D35, #35371D
Split complementary#371D28, #372C1D
Tetradic#2C1D37, #371F1D, #28371D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6EADB2
Lighter +30%#52969B
Lighter +20%#40757A
Lighter +10%#2F5558
Darker −10%#0B1516
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#123E42
Less saturated −25%#272C2D

Channel breakdown

R29
G53
B55
Red29 (11.4%)
Green53 (20.8%)
Blue55 (21.6%)
Hue184.62°
Saturation (HSL)30.95%
Lightness16.47%
Dominant channelBlue
Hex per channelR 1D · G 35 · B 37

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Every value on this page was computed from “1d3537” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.