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Recognised as Colour

#664F49

  • #664F49
  • Red
  • Dark
  • Nearest: Dim grey

#664F49 is a red with RGB values 102, 79, 73 and HSL 12°, 17%, 34%. It is a dark colour, so white text on it reaches 7.6:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#664F49#664F49
HEX#664F49
RGBrgb(102, 79, 73)
RGB (0–1)0.4, 0.3098, 0.2863
RGB percentages40%, 31%, 28.6%
HSLhsl(12.4, 16.6%, 34.3%)
HSV / HSBhsv(12.4, 28.4%, 40%)
CMYK0%, 22.5%, 28.4%, 60%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,704,969
CSS custom property--colour: #664F49;

Brightness & contrast

Relative luminance0.08898WCAG 2.x, 0 is black and 1 is white
Perceived brightness85.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.56:1
Contrast with white7.56:1WCAG normal text: AAA
Contrast with black2.78:1WCAG normal text: Fail
Greyscale equivalent#535353
Inverted#99B0B6

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#545149no red cones; affects about 1% of men; ΔE 9.3 from the original
Deuteranopia#595649no green cones; the most common form, about 1% of men; ΔE 10 from the original
Tritanopia#6C4C4Dno blue cones; rare, and affects men and women equally; ΔE 5.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.56:1WCAG large text: AAA
Contrast with black, large text2.78:1WCAG large text: Fail

Named colours

Dim grey · ΔE 14.2Gray · ΔE 21.1Dark slate grey · ΔE 23.6Slate grey · ΔE 26.9Rosy brown · ΔE 29.1Light slate grey · ΔE 29.3
Nearest named CSS colourDim grey (#696969)ΔE 14.19, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#496066
Analogous#664952, #665E49
Triadic#49664F, #4F4966
Split complementary#49665D, #495266
Tetradic#526649, #496066, #5E4966

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8B7B3
Lighter +30%#B39B95
Lighter +20%#9E7F77
Lighter +10%#84665E
Darker −10%#483834
Darker −20%#2B211E
Darker −30%#0D0A09
Darker −40%#000000
More saturated +25%#7C4233
Less saturated −25%#585858

Channel breakdown

R102
G79
B73
Red102 (40%)
Green79 (31%)
Blue73 (28.6%)
Hue12.41°
Saturation (HSL)16.57%
Lightness34.31%
Dominant channelRed
Hex per channelR 66 · G 4F · B 49

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Every value on this page was computed from “664f49” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.