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Colour

#645B61

  • #645B61
  • Grey
  • Dark
  • Nearest: Dim grey

#645B61 is a grey with RGB values 100, 91, 97 and HSL 320°, 5%, 37%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Dim grey.

Colour values

#645B61#645B61
HEX#645B61
RGBrgb(100, 91, 97)
RGB (0–1)0.3922, 0.3569, 0.3804
RGB percentages39.2%, 35.7%, 38%
HSLhsl(320, 4.7%, 37.5%)
HSV / HSBhsv(320, 9%, 39.2%)
CMYK0%, 9%, 3%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,576,993
CSS custom property--colour: #645B61;

Brightness & contrast

Relative luminance0.11055WCAG 2.x, 0 is black and 1 is white
Perceived brightness94.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.54:1
Contrast with white6.54:1WCAG normal text: AA
Contrast with black3.21:1WCAG normal text: Fail
Greyscale equivalent#5D5D5D
Inverted#9BA49E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5B5D61no red cones; affects about 1% of men; ΔE 4.8 from the original
Deuteranopia#5D5E61no green cones; the most common form, about 1% of men; ΔE 4.6 from the original
Tritanopia#655B5Dno blue cones; rare, and affects men and women equally; ΔE 2.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.54:1WCAG large text: AAA
Contrast with black, large text3.21:1WCAG large text: AA

Named colours

Dim grey · ΔE 7.1Gray · ΔE 14.9Slate grey · ΔE 17.1Dark slate grey · ΔE 18.6Light slate grey · ΔE 19.9Rosy brown · ΔE 28.2
Nearest named CSS colourDim grey (#696969)ΔE 7.09, clearly different but related
Hue familygrey
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5B645E
Analogous#625B64, #645B5D
Triadic#61645B, #5B6164
Split complementary#5D645B, #5B6463
Tetradic#64635B, #5B645E, #5B5D64

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8C3C6
Lighter +30%#B0A8AD
Lighter +20%#988D94
Lighter +10%#7F737B
Darker −10%#494347
Darker −20%#2F2A2D
Darker −30%#141213
Darker −40%#000000
More saturated +25%#7C4369
Less saturated −25%#606060

Channel breakdown

R100
G91
B97
Red100 (39.2%)
Green91 (35.7%)
Blue97 (38%)
Hue320°
Saturation (HSL)4.71%
Lightness37.45%
Dominant channelRed
Hex per channelR 64 · G 5B · B 61

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Every value on this page was computed from “645b61” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.