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Recognised as Colour

#66413F

  • #66413F
  • Red
  • Dark
  • Nearest: Dim grey

#66413F is a red with RGB values 102, 65, 63 and HSL 3°, 24%, 32%. It is a dark colour, so white text on it reaches 8.8:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#66413F#66413F
HEX#66413F
RGBrgb(102, 65, 63)
RGB (0–1)0.4, 0.2549, 0.2471
RGB percentages40%, 25.5%, 24.7%
HSLhsl(3.1, 23.6%, 32.4%)
HSV / HSBhsv(3.1, 38.2%, 40%)
CMYK0%, 36.3%, 38.2%, 60%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,701,375
CSS custom property--colour: #66413F;

Brightness & contrast

Relative luminance0.06964WCAG 2.x, 0 is black and 1 is white
Perceived brightness77.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.78:1
Contrast with white8.78:1WCAG normal text: AAA
Contrast with black2.39:1WCAG normal text: Fail
Greyscale equivalent#494949
Inverted#99BEC0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#48463Fno red cones; affects about 1% of men; ΔE 16.9 from the original
Deuteranopia#514D3Eno green cones; the most common form, about 1% of men; ΔE 17.1 from the original
Tritanopia#6D3D41no blue cones; rare, and affects men and women equally; ΔE 5.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.78:1WCAG large text: AAA
Contrast with black, large text2.39:1WCAG large text: Fail

Named colours

Dim grey · ΔE 21.7Gray · ΔE 28.1Dark slate grey · ΔE 29.9Rosy brown · ΔE 31.9Sienna · ΔE 33.2Slate grey · ΔE 33.3
Nearest named CSS colourDim grey (#696969)ΔE 21.75, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3F6466
Analogous#663F50, #66553F
Triadic#3F6641, #413F66
Split complementary#3F6655, #3F5066
Tetradic#50663F, #3F6466, #553F66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C9AAA8
Lighter +30%#B68B88
Lighter +20%#A26C69
Lighter +10%#865552
Darker −10%#462D2C
Darker −20%#271918
Darker −30%#070505
Darker −40%#000000
More saturated +25%#7B2E2A
Less saturated −25%#525252

Channel breakdown

R102
G65
B63
Red102 (40%)
Green65 (25.5%)
Blue63 (24.7%)
Hue3.08°
Saturation (HSL)23.64%
Lightness32.35%
Dominant channelRed
Hex per channelR 66 · G 41 · B 3F

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Every value on this page was computed from “66413f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.