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Recognised as Colour

#491D21

  • #491D21
  • Red
  • Dark
  • Nearest: Black

#491D21 is a red with RGB values 73, 29, 33 and HSL 355°, 43%, 20%. It is a dark colour, so white text on it reaches 14.2:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#491D21#491D21
HEX#491D21
RGBrgb(73, 29, 33)
RGB (0–1)0.2863, 0.1137, 0.1294
RGB percentages28.6%, 11.4%, 12.9%
HSLhsl(354.5, 43.1%, 20%)
HSV / HSBhsv(354.5, 60.3%, 28.6%)
CMYK0%, 60.3%, 54.8%, 71.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,791,585
CSS custom property--colour: #491D21;

Brightness & contrast

Relative luminance0.02405WCAG 2.x, 0 is black and 1 is white
Perceived brightness47 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.18:1
Contrast with white14.18:1WCAG normal text: AAA
Contrast with black1.48:1WCAG normal text: Fail
Greyscale equivalent#272727
Inverted#B6E2DE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#272521no red cones; affects about 1% of men; ΔE 22 from the original
Deuteranopia#322E20no green cones; the most common form, about 1% of men; ΔE 22.5 from the original
Tritanopia#50171Fno blue cones; rare, and affects men and women equally; ΔE 6.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.18:1WCAG large text: AAA
Contrast with black, large text1.48:1WCAG large text: Fail

Named colours

Black · ΔE 28.7Dim grey · ΔE 35.2Dark slate grey · ΔE 37.6Saddle brown · ΔE 39.3Sienna · ΔE 39.3Maroon · ΔE 41.3
Nearest named CSS colourBlack (#000000)ΔE 28.65, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1D4945
Analogous#491D37, #492F1D
Triadic#21491D, #1D2149
Split complementary#1D492F, #1D3749
Tetradic#37491D, #1D4945, #2F1D49

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C56D75
Lighter +30%#B74953
Lighter +20%#923A42
Lighter +10%#6E2B32
Darker −10%#250F11
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#561017
Less saturated −25%#3C2A2B

Channel breakdown

R73
G29
B33
Red73 (28.6%)
Green29 (11.4%)
Blue33 (12.9%)
Hue354.55°
Saturation (HSL)43.14%
Lightness20%
Dominant channelRed
Hex per channelR 49 · G 1D · B 21

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Every value on this page was computed from “491d21” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.