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Colour

#666A63

  • #666A63
  • Grey
  • Dark
  • Nearest: Dim grey

#666A63 is a grey with RGB values 102, 106, 99 and HSL 94°, 3%, 40%. It is a dark colour, so white text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Dim grey.

Colour values

#666A63#666A63
HEX#666A63
RGBrgb(102, 106, 99)
RGB (0–1)0.4, 0.4157, 0.3882
RGB percentages40%, 41.6%, 38.8%
HSLhsl(94.3, 3.4%, 40.2%)
HSV / HSBhsv(94.3, 6.6%, 41.6%)
CMYK3.8%, 0%, 6.6%, 58.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,711,907
CSS custom property--colour: #666A63;

Brightness & contrast

Relative luminance0.14034WCAG 2.x, 0 is black and 1 is white
Perceived brightness104 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.52:1
Contrast with white5.52:1WCAG normal text: AA
Contrast with black3.81:1WCAG normal text: Fail
Greyscale equivalent#696969
Inverted#99959C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6B6963no red cones; affects about 1% of men; ΔE 2.6 from the original
Deuteranopia#6A6963no green cones; the most common form, about 1% of men; ΔE 2.2 from the original
Tritanopia#666968no blue cones; rare, and affects men and women equally; ΔE 3.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.52:1WCAG large text: AAA
Contrast with black, large text3.81:1WCAG large text: AA

Named colours

Dim grey · ΔE 4.5Gray · ΔE 10.3Slate grey · ΔE 16.4Dark slate grey · ΔE 17.2Light slate grey · ΔE 18.6Dark grey · ΔE 25.4
Nearest named CSS colourDim grey (#696969)ΔE 4.52, a close match
Hue familygrey
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#67636A
Analogous#6A6A63, #636A64
Triadic#63666A, #6A6366
Split complementary#64636A, #6A636A
Tetradic#636A6A, #67636A, #6A6463

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CCCECB
Lighter +30%#B3B6B0
Lighter +20%#999D96
Lighter +10%#7F847C
Darker −10%#4D504A
Darker −20%#333532
Darker −30%#1A1B19
Darker −40%#000100
More saturated +25%#628449
Less saturated −25%#676767

Channel breakdown

R102
G106
B99
Red102 (40%)
Green106 (41.6%)
Blue99 (38.8%)
Hue94.29°
Saturation (HSL)3.41%
Lightness40.2%
Dominant channelGreen
Hex per channelR 66 · G 6A · B 63

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Every value on this page was computed from “666a63” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.