Nerdulator> put something in

Recognised as Colour

#66394F

  • #66394F
  • Red
  • Dark
  • Nearest: Dim grey

#66394F is a red with RGB values 102, 57, 79 and HSL 331°, 28%, 31%. It is a dark colour, so white text on it reaches 9.3:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#66394F#66394F
HEX#66394F
RGBrgb(102, 57, 79)
RGB (0–1)0.4, 0.2235, 0.3098
RGB percentages40%, 22.4%, 31%
HSLhsl(330.7, 28.3%, 31.2%)
HSV / HSBhsv(330.7, 44.1%, 40%)
CMYK0%, 44.1%, 22.5%, 60%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,699,343
CSS custom property--colour: #66394F;

Brightness & contrast

Relative luminance0.06316WCAG 2.x, 0 is black and 1 is white
Perceived brightness75.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.28:1
Contrast with white9.28:1WCAG normal text: AAA
Contrast with black2.26:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#99C6B0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3D4250no red cones; affects about 1% of men; ΔE 22.2 from the original
Deuteranopia#494A4Eno green cones; the most common form, about 1% of men; ΔE 22.8 from the original
Tritanopia#6C3841no blue cones; rare, and affects men and women equally; ΔE 9.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.28:1WCAG large text: AAA
Contrast with black, large text2.26:1WCAG large text: Fail

Named colours

Dim grey · ΔE 27.6Gray · ΔE 33.3Slate grey · ΔE 34.5Dark slate grey · ΔE 34.9Rosy brown · ΔE 35.8Light slate grey · ΔE 36.7
Nearest named CSS colourDim grey (#696969)ΔE 27.61, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#396650
Analogous#663965, #663A39
Triadic#4F6639, #394F66
Split complementary#39663A, #396566
Tetradic#656639, #396650, #3A3966

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CAA1B5
Lighter +30%#B8809B
Lighter +20%#A65F82
Lighter +10%#874B68
Darker −10%#452736
Darker −20%#25141C
Darker −30%#040203
Darker −40%#000000
More saturated +25%#7A254F
Less saturated −25%#524D4F

Channel breakdown

R102
G57
B79
Red102 (40%)
Green57 (22.4%)
Blue79 (31%)
Hue330.67°
Saturation (HSL)28.3%
Lightness31.18%
Dominant channelRed
Hex per channelR 66 · G 39 · B 4F

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Nerdulate something else

Nothing in mind? Surprise me · today’s page

Every value on this page was computed from “66394f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.