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Colour

#40474E

  • #40474E
  • Blue
  • Dark
  • Nearest: Dark slate grey

#40474E is a blue with RGB values 64, 71, 78 and HSL 210°, 10%, 28%. It is a dark colour, so white text on it reaches 9.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#40474E#40474E
HEX#40474E
RGBrgb(64, 71, 78)
RGB (0–1)0.251, 0.2784, 0.3059
RGB percentages25.1%, 27.8%, 30.6%
HSLhsl(210, 9.9%, 27.8%)
HSV / HSBhsv(210, 17.9%, 30.6%)
CMYK17.9%, 9%, 0%, 69.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,212,558
CSS custom property--colour: #40474E;

Brightness & contrast

Relative luminance0.06147WCAG 2.x, 0 is black and 1 is white
Perceived brightness69.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.42:1
Contrast with white9.42:1WCAG normal text: AAA
Contrast with black2.23:1WCAG normal text: Fail
Greyscale equivalent#464646
Inverted#BFB8B1

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#44474Eno red cones; affects about 1% of men; ΔE 1.7 from the original
Deuteranopia#43454Eno green cones; the most common form, about 1% of men; ΔE 2.5 from the original
Tritanopia#3C4949no blue cones; rare, and affects men and women equally; ΔE 5.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.42:1WCAG large text: AAA
Contrast with black, large text2.23:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 10.8Dim grey · ΔE 15.6Slate grey · ΔE 23.7Gray · ΔE 24.4Light slate grey · ΔE 26.8Black · ΔE 30.2
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 10.79, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4E4740
Analogous#404E4E, #40404E
Triadic#4E4047, #474E40
Split complementary#4E4040, #4E4E40
Tetradic#4E404E, #4E4740, #404E40

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A5ADB5
Lighter +30%#89949E
Lighter +20%#6E7A86
Lighter +10%#57616A
Darker −10%#292E32
Darker −20%#121416
Darker −30%#000000
Darker −40%#000000
More saturated +25%#2E4760
Less saturated −25%#474747

Channel breakdown

R64
G71
B78
Red64 (25.1%)
Green71 (27.8%)
Blue78 (30.6%)
Hue210°
Saturation (HSL)9.86%
Lightness27.84%
Dominant channelBlue
Hex per channelR 40 · G 47 · B 4E

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Every value on this page was computed from “40474e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.