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Recognised as Colour

#3F666F

  • #3F666F
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#3F666F is a cyan with RGB values 63, 102, 111 and HSL 191°, 28%, 34%. It is a dark colour, so white text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Dark slate grey.

Colour values

#3F666F#3F666F
HEX#3F666F
RGBrgb(63, 102, 111)
RGB (0–1)0.2471, 0.4, 0.4353
RGB percentages24.7%, 40%, 43.5%
HSLhsl(191.3, 27.6%, 34.1%)
HSV / HSBhsv(191.3, 43.2%, 43.5%)
CMYK43.2%, 8.1%, 0%, 56.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,154,991
CSS custom property--colour: #3F666F;

Brightness & contrast

Relative luminance0.11707WCAG 2.x, 0 is black and 1 is white
Perceived brightness93.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.28:1
Contrast with white6.28:1WCAG normal text: AA
Contrast with black3.34:1WCAG normal text: Fail
Greyscale equivalent#5E5E5E
Inverted#C09990

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5F6370no red cones; affects about 1% of men; ΔE 12.7 from the original
Deuteranopia#575E6Fno green cones; the most common form, about 1% of men; ΔE 12.6 from the original
Tritanopia#2B6A69no blue cones; rare, and affects men and women equally; ΔE 9.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.28:1WCAG large text: AAA
Contrast with black, large text3.34:1WCAG large text: AA

Named colours

Dark slate grey · ΔE 11.1Dim grey · ΔE 15.1Slate grey · ΔE 15.1Light slate grey · ΔE 17.7Teal · ΔE 19.2Gray · ΔE 19.4
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 11.07, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6F483F
Analogous#3F6F60, #3F4E6F
Triadic#6F3F66, #666F3F
Split complementary#6F3F4E, #6F603F
Tetradic#603F6F, #6F483F, #4E6F3F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ABC8CF
Lighter +30%#8AB3BD
Lighter +20%#6A9EAA
Lighter +10%#518490
Darker −10%#2D484E
Darker −20%#1A2A2E
Darker −30%#080C0D
Darker −40%#000000
More saturated +25%#297485
Less saturated −25%#555859

Channel breakdown

R63
G102
B111
Red63 (24.7%)
Green102 (40%)
Blue111 (43.5%)
Hue191.25°
Saturation (HSL)27.59%
Lightness34.12%
Dominant channelBlue
Hex per channelR 3F · G 66 · B 6F

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Every value on this page was computed from “3f666f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.