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Recognised as Colour

#37403D

  • #37403D
  • Grey
  • Dark
  • Nearest: Dark slate grey

#37403D is a grey with RGB values 55, 64, 61 and HSL 160°, 8%, 23%. It is a dark colour, so white text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#37403D#37403D
HEX#37403D
RGBrgb(55, 64, 61)
RGB (0–1)0.2157, 0.251, 0.2392
RGB percentages21.6%, 25.1%, 23.9%
HSLhsl(160, 7.6%, 23.3%)
HSV / HSBhsv(160, 14.1%, 25.1%)
CMYK14.1%, 0%, 4.7%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,620,925
CSS custom property--colour: #37403D;

Brightness & contrast

Relative luminance0.04816WCAG 2.x, 0 is black and 1 is white
Perceived brightness61.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.7:1
Contrast with white10.7:1WCAG normal text: AAA
Contrast with black1.96:1WCAG normal text: Fail
Greyscale equivalent#3E3E3E
Inverted#C8BFC2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3F3F3Dno red cones; affects about 1% of men; ΔE 4.1 from the original
Deuteranopia#3E3D3Dno green cones; the most common form, about 1% of men; ΔE 4.9 from the original
Tritanopia#35403Fno blue cones; rare, and affects men and women equally; ΔE 1.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.7:1WCAG large text: AAA
Contrast with black, large text1.96:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 9.9Dim grey · ΔE 18.7Black · ΔE 26.6Gray · ΔE 27.7Slate grey · ΔE 29Light slate grey · ΔE 32
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 9.86, clearly different but related
Hue familygrey
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#40373A
Analogous#374038, #373E40
Triadic#3D3740, #403D37
Split complementary#40373E, #403937
Tetradic#393740, #40373A, #3E4037

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9AA9A4
Lighter +30%#7F918B
Lighter +20%#667771
Lighter +10%#4F5B57
Darker −10%#1F2523
Darker −20%#080909
Darker −30%#000000
Darker −40%#000000
More saturated +25%#284F42
Less saturated −25%#3B3B3B

Channel breakdown

R55
G64
B61
Red55 (21.6%)
Green64 (25.1%)
Blue61 (23.9%)
Hue160°
Saturation (HSL)7.56%
Lightness23.33%
Dominant channelGreen
Hex per channelR 37 · G 40 · B 3D

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Every value on this page was computed from “37403d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.