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Recognised as Colour

#645B6D

  • #645B6D
  • Violet
  • Dark
  • Nearest: Dim grey

#645B6D is a violet with RGB values 100, 91, 109 and HSL 270°, 9%, 39%. It is a dark colour, so white text on it reaches 6.4:1 contrast (AA for normal text). The nearest named colour is Dim grey.

Colour values

#645B6D#645B6D
HEX#645B6D
RGBrgb(100, 91, 109)
RGB (0–1)0.3922, 0.3569, 0.4275
RGB percentages39.2%, 35.7%, 42.7%
HSLhsl(270, 9%, 39.2%)
HSV / HSBhsv(270, 16.5%, 42.7%)
CMYK8.3%, 16.5%, 0%, 57.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,577,005
CSS custom property--colour: #645B6D;

Brightness & contrast

Relative luminance0.11296WCAG 2.x, 0 is black and 1 is white
Perceived brightness95.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.44:1
Contrast with white6.44:1WCAG normal text: AA
Contrast with black3.26:1WCAG normal text: Fail
Greyscale equivalent#5E5E5E
Inverted#9BA492

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#585E6Eno red cones; affects about 1% of men; ΔE 6.1 from the original
Deuteranopia#5A5F6Cno green cones; the most common form, about 1% of men; ΔE 6.4 from the original
Tritanopia#635D61no blue cones; rare, and affects men and women equally; ΔE 8.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.44:1WCAG large text: AAA
Contrast with black, large text3.26:1WCAG large text: AA

Named colours

Dim grey · ΔE 12.4Slate grey · ΔE 16Gray · ΔE 17.8Light slate grey · ΔE 18.7Dark slate grey · ΔE 21.7Steel blue · ΔE 28.8
Nearest named CSS colourDim grey (#696969)ΔE 12.39, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#646D5B
Analogous#5B5B6D, #6D5B6D
Triadic#6D645B, #5B6D64
Split complementary#6D6D5B, #5B6D5B
Tetradic#6D5B5B, #646D5B, #5B6D6D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CAC5CF
Lighter +30%#B1A9B8
Lighter +20%#978EA0
Lighter +10%#7E7289
Darker −10%#4B4451
Darker −20%#312D35
Darker −30%#18151A
Darker −40%#000000
More saturated +25%#644286
Less saturated −25%#646464

Channel breakdown

R100
G91
B109
Red100 (39.2%)
Green91 (35.7%)
Blue109 (42.7%)
Hue270°
Saturation (HSL)9%
Lightness39.22%
Dominant channelBlue
Hex per channelR 64 · G 5B · B 6D

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Every value on this page was computed from “645b6d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.