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Recognised as Colour

#371F1D

  • #371F1D
  • Red
  • Dark
  • Nearest: Black

#371F1D is a red with RGB values 55, 31, 29 and HSL 5°, 31%, 16%. It is a dark colour, so white text on it reaches 15.3:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#371F1D#371F1D
HEX#371F1D
RGBrgb(55, 31, 29)
RGB (0–1)0.2157, 0.1216, 0.1137
RGB percentages21.6%, 12.2%, 11.4%
HSLhsl(4.6, 31%, 16.5%)
HSV / HSBhsv(4.6, 47.3%, 21.6%)
CMYK0%, 43.6%, 47.3%, 78.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,612,445
CSS custom property--colour: #371F1D;

Brightness & contrast

Relative luminance0.01881WCAG 2.x, 0 is black and 1 is white
Perceived brightness39.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.26:1
Contrast with white15.26:1WCAG normal text: AAA
Contrast with black1.38:1WCAG normal text: Fail
Greyscale equivalent#242424
Inverted#C8E0E2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#24221Dno red cones; affects about 1% of men; ΔE 12 from the original
Deuteranopia#2A271Dno green cones; the most common form, about 1% of men; ΔE 12.1 from the original
Tritanopia#3C1C1Fno blue cones; rare, and affects men and women equally; ΔE 4.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.26:1WCAG large text: AAA
Contrast with black, large text1.38:1WCAG large text: Fail

Named colours

Black · ΔE 19.7Dark slate grey · ΔE 30Dim grey · ΔE 32.3Gray · ΔE 40.9Slate grey · ΔE 43.7Saddle brown · ΔE 44.1
Nearest named CSS colourBlack (#000000)ΔE 19.74, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1D3537
Analogous#371D28, #372C1D
Triadic#1D371F, #1F1D37
Split complementary#1D372C, #1D2837
Tetradic#28371D, #1D3537, #2C1D37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B2736E
Lighter +30%#9B5752
Lighter +20%#7A4540
Lighter +10%#58322F
Darker −10%#160C0B
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#421612
Less saturated −25%#2D2827

Channel breakdown

R55
G31
B29
Red55 (21.6%)
Green31 (12.2%)
Blue29 (11.4%)
Hue4.62°
Saturation (HSL)30.95%
Lightness16.47%
Dominant channelRed
Hex per channelR 37 · G 1F · B 1D

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Every value on this page was computed from “371f1d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.