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Colour

#273D40

  • #273D40
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#273D40 is a cyan with RGB values 39, 61, 64 and HSL 187°, 24%, 20%. 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

#273D40#273D40
HEX#273D40
RGBrgb(39, 61, 64)
RGB (0–1)0.1529, 0.2392, 0.251
RGB percentages15.3%, 23.9%, 25.1%
HSLhsl(187.2, 24.3%, 20.2%)
HSV / HSBhsv(187.2, 39.1%, 25.1%)
CMYK39.1%, 4.7%, 0%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,571,584
CSS custom property--colour: #273D40;

Brightness & contrast

Relative luminance0.04139WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.49:1
Contrast with white11.49:1WCAG normal text: AAA
Contrast with black1.83:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#D8C2BF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3A3B40no red cones; affects about 1% of men; ΔE 8.6 from the original
Deuteranopia#353840no green cones; the most common form, about 1% of men; ΔE 8.5 from the original
Tritanopia#1E3F3Eno blue cones; rare, and affects men and women equally; ΔE 4.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.49:1WCAG large text: AAA
Contrast with black, large text1.83:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 8.2Dim grey · ΔE 22.2Black · ΔE 25.7Slate grey · ΔE 29.8Gray · ΔE 30.8Teal · ΔE 32.3
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 8.23, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#402A27
Analogous#274037, #273040
Triadic#40273D, #3D4027
Split complementary#402730, #403727
Tetradic#372740, #402A27, #304027

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#81ACB2
Lighter +30%#61979F
Lighter +20%#4E797F
Lighter +10%#3A5B60
Darker −10%#141F20
Darker −20%#000101
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1A474D
Less saturated −25%#343434

Channel breakdown

R39
G61
B64
Red39 (15.3%)
Green61 (23.9%)
Blue64 (25.1%)
Hue187.2°
Saturation (HSL)24.27%
Lightness20.2%
Dominant channelBlue
Hex per channelR 27 · G 3D · B 40

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Every value on this page was computed from “273d40” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.