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Recognised as Colour

#646A74

  • #646A74
  • Grey
  • Dark
  • Nearest: Dim grey

#646A74 is a grey with RGB values 100, 106, 116 and HSL 217°, 7%, 42%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Dim grey.

Colour values

#646A74#646A74
HEX#646A74
RGBrgb(100, 106, 116)
RGB (0–1)0.3922, 0.4157, 0.4549
RGB percentages39.2%, 41.6%, 45.5%
HSLhsl(217.5, 7.4%, 42.4%)
HSV / HSBhsv(217.5, 13.8%, 45.5%)
CMYK13.8%, 8.6%, 0%, 54.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,580,852
CSS custom property--colour: #646A74;

Brightness & contrast

Relative luminance0.14278WCAG 2.x, 0 is black and 1 is white
Perceived brightness105.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.45:1
Contrast with white5.45:1WCAG normal text: AA
Contrast with black3.86:1WCAG normal text: Fail
Greyscale equivalent#696969
Inverted#9B958B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#676A75no red cones; affects about 1% of men; ΔE 1.4 from the original
Deuteranopia#656974no green cones; the most common form, about 1% of men; ΔE 1 from the original
Tritanopia#606C6Dno blue cones; rare, and affects men and women equally; ΔE 6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.45:1WCAG large text: AAA
Contrast with black, large text3.86:1WCAG large text: AA

Named colours

Dim grey · ΔE 6.4Slate grey · ΔE 9.5Gray · ΔE 11Light slate grey · ΔE 12.4Dark slate grey · ΔE 17.9Dark grey · ΔE 25.4
Nearest named CSS colourDim grey (#696969)ΔE 6.37, clearly different but related
Hue familygrey
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#746E64
Analogous#647274, #666474
Triadic#74646A, #6A7464
Split complementary#746664, #727464
Tetradic#746472, #746E64, #647466

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CFD1D5
Lighter +30%#B3B7BE
Lighter +20%#989DA6
Lighter +10%#7D838F
Darker −10%#4C5159
Darker −20%#35383D
Darker −30%#1D1F22
Darker −40%#060606
More saturated +25%#49638F
Less saturated −25%#6C6C6C

Channel breakdown

R100
G106
B116
Red100 (39.2%)
Green106 (41.6%)
Blue116 (45.5%)
Hue217.5°
Saturation (HSL)7.41%
Lightness42.35%
Dominant channelBlue
Hex per channelR 64 · G 6A · B 74

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Every value on this page was computed from “646a74” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.