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Recognised as Colour

#3F4553

  • #3F4553
  • Blue
  • Dark
  • Nearest: Dark slate grey

#3F4553 is a blue with RGB values 63, 69, 83 and HSL 222°, 14%, 29%. It is a dark colour, so white text on it reaches 9.6:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#3F4553#3F4553
HEX#3F4553
RGBrgb(63, 69, 83)
RGB (0–1)0.2471, 0.2706, 0.3255
RGB percentages24.7%, 27.1%, 32.5%
HSLhsl(222, 13.7%, 28.6%)
HSV / HSBhsv(222, 24.1%, 32.5%)
CMYK24.1%, 16.9%, 0%, 67.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,146,515
CSS custom property--colour: #3F4553;

Brightness & contrast

Relative luminance0.05938WCAG 2.x, 0 is black and 1 is white
Perceived brightness69 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.6:1
Contrast with white9.6:1WCAG normal text: AAA
Contrast with black2.19:1WCAG normal text: Fail
Greyscale equivalent#454545
Inverted#C0BAAC

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#414654no red cones; affects about 1% of men; ΔE 0.7 from the original
Deuteranopia#3F4453no green cones; the most common form, about 1% of men; ΔE 0.9 from the original
Tritanopia#3A484Ano blue cones; rare, and affects men and women equally; ΔE 8.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.6:1WCAG large text: AAA
Contrast with black, large text2.19:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 14.1Dim grey · ΔE 17.8Slate grey · ΔE 23.8Gray · ΔE 26Light slate grey · ΔE 26.9Black · ΔE 30.7
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 14.07, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#534D3F
Analogous#3F4F53, #433F53
Triadic#533F45, #45533F
Split complementary#53433F, #4F533F
Tetradic#533F4F, #534D3F, #3F5343

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A4ABBA
Lighter +30%#8790A4
Lighter +20%#6B758D
Lighter +10%#555D70
Darker −10%#292D36
Darker −20%#131519
Darker −30%#000000
Darker −40%#000000
More saturated +25%#2D3E65
Less saturated −25%#494949

Channel breakdown

R63
G69
B83
Red63 (24.7%)
Green69 (27.1%)
Blue83 (32.5%)
Hue222°
Saturation (HSL)13.7%
Lightness28.63%
Dominant channelBlue
Hex per channelR 3F · G 45 · B 53

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Every value on this page was computed from “3f4553” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.