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Recognised as Colour

#2D181C

  • #2D181C
  • Red
  • Dark
  • Nearest: Black

#2D181C is a red with RGB values 45, 24, 28 and HSL 349°, 30%, 14%. It is a dark colour, so white text on it reaches 16.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#2D181C#2D181C
HEX#2D181C
RGBrgb(45, 24, 28)
RGB (0–1)0.1765, 0.0941, 0.1098
RGB percentages17.6%, 9.4%, 11%
HSLhsl(348.6, 30.4%, 13.5%)
HSV / HSBhsv(348.6, 46.7%, 17.6%)
CMYK0%, 46.7%, 37.8%, 82.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,955,292
CSS custom property--colour: #2D181C;

Brightness & contrast

Relative luminance0.01295WCAG 2.x, 0 is black and 1 is white
Perceived brightness32.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.68:1
Contrast with white16.68:1WCAG normal text: AAA
Contrast with black1.26:1WCAG normal text: Fail
Greyscale equivalent#1D1D1D
Inverted#D2E7E3

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1B1C1Cno red cones; affects about 1% of men; ΔE 11.9 from the original
Deuteranopia#211F1Cno green cones; the most common form, about 1% of men; ΔE 11 from the original
Tritanopia#311619no blue cones; rare, and affects men and women equally; ΔE 3.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.68:1WCAG large text: AAA
Contrast with black, large text1.26:1WCAG large text: Fail

Named colours

Black · ΔE 16Dark slate grey · ΔE 30.9Dim grey · ΔE 35.1Gray · ΔE 43.8Slate grey · ΔE 45.4Light slate grey · ΔE 48.4
Nearest named CSS colourBlack (#000000)ΔE 15.97, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#182D29
Analogous#2D1827, #2D1E18
Triadic#1C2D18, #181C2D
Split complementary#182D1E, #18272D
Tetradic#272D18, #182D29, #1E182D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AD6472
Lighter +30%#914D5A
Lighter +20%#703B45
Lighter +10%#4E2A31
Darker −10%#0C0607
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#360F17
Less saturated −25%#242121

Channel breakdown

R45
G24
B28
Red45 (17.6%)
Green24 (9.4%)
Blue28 (11%)
Hue348.57°
Saturation (HSL)30.43%
Lightness13.53%
Dominant channelRed
Hex per channelR 2D · G 18 · B 1C

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Every value on this page was computed from “2d181c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.