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Colour

#40403E

  • #40403E
  • Grey
  • Dark
  • Nearest: Dark slate grey

#40403E is a grey with RGB values 64, 64, 62 and HSL 60°, 2%, 25%. It is a dark colour, so white text on it reaches 10.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#40403E#40403E
HEX#40403E
RGBrgb(64, 64, 62)
RGB (0–1)0.251, 0.251, 0.2431
RGB percentages25.1%, 25.1%, 24.3%
HSLhsl(60, 1.6%, 24.7%)
HSV / HSBhsv(60, 3.1%, 25.1%)
CMYK0%, 0%, 3.1%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,210,750
CSS custom property--colour: #40403E;

Brightness & contrast

Relative luminance0.05105WCAG 2.x, 0 is black and 1 is white
Perceived brightness63.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.39:1
Contrast with white10.39:1WCAG normal text: AAA
Contrast with black2.02:1WCAG normal text: Fail
Greyscale equivalent#404040
Inverted#BFBFC1

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#40403Eno red cones; affects about 1% of men; ΔE 0 from the original
Deuteranopia#40403Eno green cones; the most common form, about 1% of men; ΔE 0 from the original
Tritanopia#40403Fno blue cones; rare, and affects men and women equally; ΔE 0.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.39:1WCAG large text: AAA
Contrast with black, large text2.02:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 13Dim grey · ΔE 17.4Gray · ΔE 26.6Black · ΔE 27.1Slate grey · ΔE 28.4Light slate grey · ΔE 31.5
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 13.02, a distinctly different colour
Hue familygrey
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3E3E40
Analogous#403F3E, #3F403E
Triadic#3E4040, #403E40
Split complementary#3E3F40, #3F3E40
Tetradic#3E403F, #3E3E40, #403E3F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A6A6A4
Lighter +30%#8D8D8A
Lighter +20%#747470
Lighter +10%#5A5A57
Darker −10%#262625
Darker −20%#0C0C0C
Darker −30%#000000
Darker −40%#000000
More saturated +25%#50502E
Less saturated −25%#3F3F3F

Channel breakdown

R64
G64
B62
Red64 (25.1%)
Green64 (25.1%)
Blue62 (24.3%)
Hue60°
Saturation (HSL)1.59%
Lightness24.71%
Dominant channelRed and Green
Hex per channelR 40 · G 40 · B 3E

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Every value on this page was computed from “40403e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.