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Recognised as Colour

#40371D

  • #40371D
  • Orange
  • Dark
  • Nearest: Dark slate grey

#40371D is a orange with RGB values 64, 55, 29 and HSL 45°, 38%, 18%. It is a dark colour, so white text on it reaches 11.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#40371D#40371D
HEX#40371D
RGBrgb(64, 55, 29)
RGB (0–1)0.251, 0.2157, 0.1137
RGB percentages25.1%, 21.6%, 11.4%
HSLhsl(44.6, 37.6%, 18.2%)
HSV / HSBhsv(44.6, 54.7%, 25.1%)
CMYK0%, 14.1%, 54.7%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,208,413
CSS custom property--colour: #40371D;

Brightness & contrast

Relative luminance0.03911WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.78:1
Contrast with white11.78:1WCAG normal text: AAA
Contrast with black1.78:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#BFC8E2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3C361Bno red cones; affects about 1% of men; ΔE 1.8 from the original
Deuteranopia#3E391Eno green cones; the most common form, about 1% of men; ΔE 2.2 from the original
Tritanopia#453331no blue cones; rare, and affects men and women equally; ΔE 15.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.78:1WCAG large text: AAA
Contrast with black, large text1.78:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 25.5Dim grey · ΔE 27.5Black · ΔE 29.3Dark olivegreen · ΔE 29.5Gray · ΔE 35Saddle brown · ΔE 38.1
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 25.54, a distinctly different colour
Hue familyorange
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1D2640
Analogous#40251D, #38401D
Triadic#1D4037, #371D40
Split complementary#1D3840, #251D40
Tetradic#1D4025, #1D2640, #401D38

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BDA86C
Lighter +30%#A9914D
Lighter +20%#86733D
Lighter +10%#63552D
Darker −10%#1D190D
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#4C3D11
Less saturated −25%#343129

Channel breakdown

R64
G55
B29
Red64 (25.1%)
Green55 (21.6%)
Blue29 (11.4%)
Hue44.57°
Saturation (HSL)37.63%
Lightness18.24%
Dominant channelRed
Hex per channelR 40 · G 37 · B 1D

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Every value on this page was computed from “40371d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.