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Recognised as Colour

#243F3B

  • #243F3B
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#243F3B is a cyan with RGB values 36, 63, 59 and HSL 171°, 27%, 19%. It is a dark colour, so white text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#243F3B#243F3B
HEX#243F3B
RGBrgb(36, 63, 59)
RGB (0–1)0.1412, 0.2471, 0.2314
RGB percentages14.1%, 24.7%, 23.1%
HSLhsl(171.1, 27.3%, 19.4%)
HSV / HSBhsv(171.1, 42.9%, 24.7%)
CMYK42.9%, 0%, 6.3%, 75.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,375,483
CSS custom property--colour: #243F3B;

Brightness & contrast

Relative luminance0.04246WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.36:1
Contrast with white11.36:1WCAG normal text: AAA
Contrast with black1.85:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#DBC0C4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3D3C3Bno red cones; affects about 1% of men; ΔE 11.8 from the original
Deuteranopia#38393Bno green cones; the most common form, about 1% of men; ΔE 11.5 from the original
Tritanopia#1A403Eno blue cones; rare, and affects men and women equally; ΔE 3.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.36:1WCAG large text: AAA
Contrast with black, large text1.85:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 7.4Dim grey · ΔE 23Black · ΔE 27Teal · ΔE 30.5Gray · ΔE 31.3Slate grey · ΔE 31.4
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 7.4, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3F2428
Analogous#243F2E, #24363F
Triadic#3B243F, #3F3B24
Split complementary#3F2436, #3F2D24
Tetradic#2D243F, #3F2428, #363F24

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7BB4AB
Lighter +30%#5CA096
Lighter +20%#498078
Lighter +10%#375F59
Darker −10%#111F1D
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#184B44
Less saturated −25%#303332

Channel breakdown

R36
G63
B59
Red36 (14.1%)
Green63 (24.7%)
Blue59 (23.1%)
Hue171.11°
Saturation (HSL)27.27%
Lightness19.41%
Dominant channelGreen
Hex per channelR 24 · G 3F · B 3B

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Every value on this page was computed from “243f3b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.