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Recognised as Colour

#1F3E40

  • #1F3E40
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#1F3E40 is a cyan with RGB values 31, 62, 64 and HSL 184°, 35%, 19%. It is a dark colour, so white text on it reaches 11.5:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1F3E40#1F3E40
HEX#1F3E40
RGBrgb(31, 62, 64)
RGB (0–1)0.1216, 0.2431, 0.251
RGB percentages12.2%, 24.3%, 25.1%
HSLhsl(183.6, 34.7%, 18.6%)
HSV / HSBhsv(183.6, 51.6%, 25.1%)
CMYK51.6%, 3.1%, 0%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,047,552
CSS custom property--colour: #1F3E40;

Brightness & contrast

Relative luminance0.04107WCAG 2.x, 0 is black and 1 is white
Perceived brightness54.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.53:1
Contrast with white11.53:1WCAG normal text: AAA
Contrast with black1.82:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#E0C1BF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3A3C40no red cones; affects about 1% of men; ΔE 11.2 from the original
Deuteranopia#343740no green cones; the most common form, about 1% of men; ΔE 11.9 from the original
Tritanopia#0E403Fno blue cones; rare, and affects men and women equally; ΔE 5.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.53:1WCAG large text: AAA
Contrast with black, large text1.82:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 7.4Dim grey · ΔE 23.6Black · ΔE 26.8Teal · ΔE 30.4Slate grey · ΔE 30.6Gray · ΔE 31.9
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 7.37, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#40211F
Analogous#1F4031, #1F2E40
Triadic#401F3E, #3E401F
Split complementary#401F2E, #40311F
Tetradic#311F40, #40211F, #2E401F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#71B6BA
Lighter +30%#51A2A7
Lighter +20%#408185
Lighter +10%#305F62
Darker −10%#0E1D1E
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#13484C
Less saturated −25%#2B3434

Channel breakdown

R31
G62
B64
Red31 (12.2%)
Green62 (24.3%)
Blue64 (25.1%)
Hue183.64°
Saturation (HSL)34.74%
Lightness18.63%
Dominant channelBlue
Hex per channelR 1F · G 3E · B 40

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Every value on this page was computed from “1f3e40” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.