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Recognised as Colour

#644A47

  • #644A47
  • Red
  • Dark
  • Nearest: Dim grey

#644A47 is a red with RGB values 100, 74, 71 and HSL 6°, 17%, 34%. It is a dark colour, so white text on it reaches 8:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#644A47#644A47
HEX#644A47
RGBrgb(100, 74, 71)
RGB (0–1)0.3922, 0.2902, 0.2784
RGB percentages39.2%, 29%, 27.8%
HSLhsl(6.2, 17%, 33.5%)
HSV / HSBhsv(6.2, 29%, 39.2%)
CMYK0%, 26%, 29%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,572,615
CSS custom property--colour: #644A47;

Brightness & contrast

Relative luminance0.08062WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.04:1
Contrast with white8.04:1WCAG normal text: AAA
Contrast with black2.61:1WCAG normal text: Fail
Greyscale equivalent#4F4F4F
Inverted#9BB5B8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4F4D47no red cones; affects about 1% of men; ΔE 11.3 from the original
Deuteranopia#555247no green cones; the most common form, about 1% of men; ΔE 11.5 from the original
Tritanopia#6A4749no blue cones; rare, and affects men and women equally; ΔE 4.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.04:1WCAG large text: AAA
Contrast with black, large text2.61:1WCAG large text: Fail

Named colours

Dim grey · ΔE 16Gray · ΔE 23Dark slate grey · ΔE 24.5Slate grey · ΔE 28.1Rosy brown · ΔE 30.2Light slate grey · ΔE 30.6
Nearest named CSS colourDim grey (#696969)ΔE 15.95, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#476164
Analogous#644753, #645947
Triadic#47644A, #4A4764
Split complementary#476459, #475264
Tetradic#536447, #476164, #594764

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C7B2B0
Lighter +30%#B29592
Lighter +20%#9D7974
Lighter +10%#82605C
Darker −10%#463432
Darker −20%#281E1D
Darker −30%#0B0807
Darker −40%#000000
More saturated +25%#793932
Less saturated −25%#565656

Channel breakdown

R100
G74
B71
Red100 (39.2%)
Green74 (29%)
Blue71 (27.8%)
Hue6.21°
Saturation (HSL)16.96%
Lightness33.53%
Dominant channelRed
Hex per channelR 64 · G 4A · B 47

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Every value on this page was computed from “644a47” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.