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Recognised as Colour

#3F5758

  • #3F5758
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#3F5758 is a cyan with RGB values 63, 87, 88 and HSL 182°, 17%, 30%. It is a dark colour, so white text on it reaches 7.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#3F5758#3F5758
HEX#3F5758
RGBrgb(63, 87, 88)
RGB (0–1)0.2471, 0.3412, 0.3451
RGB percentages24.7%, 34.1%, 34.5%
HSLhsl(182.4, 16.6%, 29.6%)
HSV / HSBhsv(182.4, 28.4%, 34.5%)
CMYK28.4%, 1.1%, 0%, 65.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,151,128
CSS custom property--colour: #3F5758;

Brightness & contrast

Relative luminance0.08578WCAG 2.x, 0 is black and 1 is white
Perceived brightness80.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.73:1
Contrast with white7.73:1WCAG normal text: AAA
Contrast with black2.72:1WCAG normal text: Fail
Greyscale equivalent#525252
Inverted#C0A8A7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#545558no red cones; affects about 1% of men; ΔE 9.2 from the original
Deuteranopia#4F5158no green cones; the most common form, about 1% of men; ΔE 9.6 from the original
Tritanopia#375957no blue cones; rare, and affects men and women equally; ΔE 4.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.73:1WCAG large text: AAA
Contrast with black, large text2.72:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 4.9Dim grey · ΔE 13.2Slate grey · ΔE 20.1Gray · ΔE 20.7Light slate grey · ΔE 23Teal · ΔE 24.5
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 4.9, a close match
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#58403F
Analogous#3F584D, #3F4B58
Triadic#583F57, #57583F
Split complementary#583F4B, #584D3F
Tetradic#4D3F58, #58403F, #4B583F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A5BDBE
Lighter +30%#87A8A9
Lighter +20%#6A9293
Lighter +10%#547476
Darker −10%#2A3A3A
Darker −20%#141C1D
Darker −30%#000000
Darker −40%#000000
More saturated +25%#2C686B
Less saturated −25%#4C4C4C

Channel breakdown

R63
G87
B88
Red63 (24.7%)
Green87 (34.1%)
Blue88 (34.5%)
Hue182.4°
Saturation (HSL)16.56%
Lightness29.61%
Dominant channelBlue
Hex per channelR 3F · G 57 · B 58

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Every value on this page was computed from “3f5758” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.