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Colour

#664C46

  • #664C46
  • Red
  • Dark
  • Nearest: Dim grey

#664C46 is a red with RGB values 102, 76, 70 and HSL 11°, 19%, 34%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#664C46#664C46
HEX#664C46
RGBrgb(102, 76, 70)
RGB (0–1)0.4, 0.298, 0.2745
RGB percentages40%, 29.8%, 27.5%
HSLhsl(11.2, 18.6%, 33.7%)
HSV / HSBhsv(11.2, 31.4%, 40%)
CMYK0%, 25.5%, 31.4%, 60%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,704,198
CSS custom property--colour: #664C46;

Brightness & contrast

Relative luminance0.08436WCAG 2.x, 0 is black and 1 is white
Perceived brightness84 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.81:1
Contrast with white7.81:1WCAG normal text: AAA
Contrast with black2.69:1WCAG normal text: Fail
Greyscale equivalent#515151
Inverted#99B3B9

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#524F46no red cones; affects about 1% of men; ΔE 10.9 from the original
Deuteranopia#585446no green cones; the most common form, about 1% of men; ΔE 11.2 from the original
Tritanopia#6C494Ano 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 text7.81:1WCAG large text: AAA
Contrast with black, large text2.69:1WCAG large text: Fail

Named colours

Dim grey · ΔE 15.9Gray · ΔE 22.6Dark slate grey · ΔE 24.9Slate grey · ΔE 28.4Rosy brown · ΔE 29.6Light slate grey · ΔE 30.9
Nearest named CSS colourDim grey (#696969)ΔE 15.9, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#466066
Analogous#664650, #665C46
Triadic#46664C, #4C4666
Split complementary#46665C, #465066
Tetradic#506646, #466066, #5C4666

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8B4B0
Lighter +30%#B49891
Lighter +20%#9F7B73
Lighter +10%#84635B
Darker −10%#483531
Darker −20%#2A1F1C
Darker −30%#0B0808
Darker −40%#000000
More saturated +25%#7C3F31
Less saturated −25%#565656

Channel breakdown

R102
G76
B70
Red102 (40%)
Green76 (29.8%)
Blue70 (27.5%)
Hue11.25°
Saturation (HSL)18.6%
Lightness33.73%
Dominant channelRed
Hex per channelR 66 · G 4C · B 46

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Every value on this page was computed from “664c46” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.