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Recognised as Colour

#1D1718

  • #1D1718
  • Red
  • Dark
  • Nearest: Black

#1D1718 is a red with RGB values 29, 23, 24 and HSL 350°, 12%, 10%. It is a dark colour, so white text on it reaches 17.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#1D1718#1D1718
HEX#1D1718
RGBrgb(29, 23, 24)
RGB (0–1)0.1137, 0.0902, 0.0941
RGB percentages11.4%, 9%, 9.4%
HSLhsl(350, 11.5%, 10.2%)
HSV / HSBhsv(350, 20.7%, 11.4%)
CMYK0%, 20.7%, 17.2%, 88.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,906,456
CSS custom property--colour: #1D1718;

Brightness & contrast

Relative luminance0.0094WCAG 2.x, 0 is black and 1 is white
Perceived brightness25.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.68:1
Contrast with white17.68:1WCAG normal text: AAA
Contrast with black1.19:1WCAG normal text: Fail
Greyscale equivalent#181818
Inverted#E2E8E7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#181818no red cones; affects about 1% of men; ΔE 3.3 from the original
Deuteranopia#191918no green cones; the most common form, about 1% of men; ΔE 3.5 from the original
Tritanopia#1E1717no blue cones; rare, and affects men and women equally; ΔE 1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.68:1WCAG large text: AAA
Contrast with black, large text1.19:1WCAG large text: Fail

Named colours

Black · ΔE 9.1Dark slate grey · ΔE 27.6Dim grey · ΔE 36.1Gray · ΔE 45.2Slate grey · ΔE 46Light slate grey · ΔE 49.1
Nearest named CSS colourBlack (#000000)ΔE 9.08, clearly different but related
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#171D1C
Analogous#1D171B, #1D1917
Triadic#181D17, #17181D
Split complementary#171D19, #171B1D
Tetradic#1B1D17, #171D1C, #19171D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8F7176
Lighter +30%#725B5F
Lighter +20%#564447
Lighter +10%#392E30
Darker −10%#010000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#241114
Less saturated −25%#1A1A1A

Channel breakdown

R29
G23
B24
Red29 (11.4%)
Green23 (9%)
Blue24 (9.4%)
Hue350°
Saturation (HSL)11.54%
Lightness10.2%
Dominant channelRed
Hex per channelR 1D · G 17 · B 18

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Every value on this page was computed from “1d1718” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.