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Recognised as Colour

#1F040D

  • #1F040D
  • Red
  • Dark
  • Nearest: Black

#1F040D is a red with RGB values 31, 4, 13 and HSL 340°, 77%, 7%. It is a dark colour, so white text on it reaches 19.4:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#1F040D#1F040D
HEX#1F040D
RGBrgb(31, 4, 13)
RGB (0–1)0.1216, 0.0157, 0.051
RGB percentages12.2%, 1.6%, 5.1%
HSLhsl(340, 77.1%, 6.9%)
HSV / HSBhsv(340, 87.1%, 12.2%)
CMYK0%, 87.1%, 58.1%, 87.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,032,653
CSS custom property--colour: #1F040D;

Brightness & contrast

Relative luminance0.00407WCAG 2.x, 0 is black and 1 is white
Perceived brightness17.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 19.42:1
Contrast with white19.42:1WCAG normal text: AAA
Contrast with black1.08:1WCAG normal text: Fail
Greyscale equivalent#0A0A0A
Inverted#E0FBF2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#080A0Dno red cones; affects about 1% of men; ΔE 12.3 from the original
Deuteranopia#100F0Cno green cones; the most common form, about 1% of men; ΔE 12.3 from the original
Tritanopia#220207no blue cones; rare, and affects men and women equally; ΔE 3.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text19.42:1WCAG large text: AAA
Contrast with black, large text1.08:1WCAG large text: Fail

Named colours

Black · ΔE 12.6Dark slate grey · ΔE 36.6Dim grey · ΔE 42.5Gray · ΔE 51.3Dark slateblue · ΔE 52.2Slate grey · ΔE 52.3
Nearest named CSS colourBlack (#000000)ΔE 12.6, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#041F16
Analogous#1F041A, #1F0904
Triadic#0D1F04, #040D1F
Split complementary#041F08, #041B1F
Tetradic#1A1F04, #041F16, #09041F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D41B59
Lighter +30%#A71546
Lighter +20%#791033
Lighter +10%#4C0A20
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#23000C
Less saturated −25%#1B080E

Channel breakdown

R31
G4
B13
Red31 (12.2%)
Green4 (1.6%)
Blue13 (5.1%)
Hue340°
Saturation (HSL)77.14%
Lightness6.86%
Dominant channelRed
Hex per channelR 1F · G 04 · B 0D

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Every value on this page was computed from “1f040d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.