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Recognised as Colour

#646A63

  • #646A63
  • Grey
  • Dark
  • Nearest: Dim grey

#646A63 is a grey with RGB values 100, 106, 99 and HSL 111°, 3%, 40%. It is a dark colour, so white text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Dim grey.

Colour values

#646A63#646A63
HEX#646A63
RGBrgb(100, 106, 99)
RGB (0–1)0.3922, 0.4157, 0.3882
RGB percentages39.2%, 41.6%, 38.8%
HSLhsl(111.4, 3.4%, 40.2%)
HSV / HSBhsv(111.4, 6.6%, 41.6%)
CMYK5.7%, 0%, 6.6%, 58.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,580,835
CSS custom property--colour: #646A63;

Brightness & contrast

Relative luminance0.13918WCAG 2.x, 0 is black and 1 is white
Perceived brightness103.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.55:1
Contrast with white5.55:1WCAG normal text: AA
Contrast with black3.78:1WCAG normal text: Fail
Greyscale equivalent#686868
Inverted#9B959C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6A6963no red cones; affects about 1% of men; ΔE 3 from the original
Deuteranopia#696863no green cones; the most common form, about 1% of men; ΔE 3.2 from the original
Tritanopia#646968no 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 text5.55:1WCAG large text: AAA
Contrast with black, large text3.78:1WCAG large text: AA

Named colours

Dim grey · ΔE 4.9Gray · ΔE 10.7Slate grey · ΔE 16.3Dark slate grey · ΔE 16.6Light slate grey · ΔE 18.6Dark grey · ΔE 25.6
Nearest named CSS colourDim grey (#696969)ΔE 4.9, a close match
Hue familygrey
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#69636A
Analogous#686A63, #636A66
Triadic#63646A, #6A6364
Split complementary#66636A, #6A6368
Tetradic#63686A, #69636A, #6A6663

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CBCECB
Lighter +30%#B1B6B0
Lighter +20%#979D96
Lighter +10%#7D847C
Darker −10%#4B504A
Darker −20%#323532
Darker −30%#191B19
Darker −40%#000100
More saturated +25%#528449
Less saturated −25%#676767

Channel breakdown

R100
G106
B99
Red100 (39.2%)
Green106 (41.6%)
Blue99 (38.8%)
Hue111.43°
Saturation (HSL)3.41%
Lightness40.2%
Dominant channelGreen
Hex per channelR 64 · G 6A · B 63

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Every value on this page was computed from “646a63” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.