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Colour

#40434B

  • #40434B
  • Grey
  • Dark
  • Nearest: Dark slate grey

#40434B is a grey with RGB values 64, 67, 75 and HSL 224°, 8%, 27%. It is a dark colour, so white text on it reaches 9.9:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#40434B#40434B
HEX#40434B
RGBrgb(64, 67, 75)
RGB (0–1)0.251, 0.2627, 0.2941
RGB percentages25.1%, 26.3%, 29.4%
HSLhsl(223.6, 7.9%, 27.3%)
HSV / HSBhsv(223.6, 14.7%, 29.4%)
CMYK14.7%, 10.7%, 0%, 70.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,211,531
CSS custom property--colour: #40434B;

Brightness & contrast

Relative luminance0.05612WCAG 2.x, 0 is black and 1 is white
Perceived brightness67.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.89:1
Contrast with white9.89:1WCAG normal text: AAA
Contrast with black2.12:1WCAG normal text: Fail
Greyscale equivalent#434343
Inverted#BFBCB4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#41444Bno red cones; affects about 1% of men; ΔE 0.8 from the original
Deuteranopia#40434Bno green cones; the most common form, about 1% of men; ΔE 0 from the original
Tritanopia#3E4446no blue cones; rare, and affects men and women equally; ΔE 4.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.89:1WCAG large text: AAA
Contrast with black, large text2.12:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 12.8Dim grey · ΔE 16.9Slate grey · ΔE 25.2Gray · ΔE 25.7Light slate grey · ΔE 28.3Black · ΔE 28.9
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 12.81, a distinctly different colour
Hue familygrey
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4B4840
Analogous#40494B, #43404B
Triadic#4B4043, #434B40
Split complementary#4B4340, #494B40
Tetradic#4B4049, #4B4840, #404B43

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A5A8B2
Lighter +30%#898E9B
Lighter +20%#6F7482
Lighter +10%#575C67
Darker −10%#292A2F
Darker −20%#111214
Darker −30%#000000
Darker −40%#000000
More saturated +25%#2F3B5C
Less saturated −25%#464646

Channel breakdown

R64
G67
B75
Red64 (25.1%)
Green67 (26.3%)
Blue75 (29.4%)
Hue223.64°
Saturation (HSL)7.91%
Lightness27.25%
Dominant channelBlue
Hex per channelR 40 · G 43 · B 4B

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Every value on this page was computed from “40434b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.