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Recognised as Colour

#646AD2

  • #646AD2
  • Blue
  • Dark
  • Nearest: Slate blue

#646AD2 is a blue with RGB values 100, 106, 210 and HSL 237°, 55%, 61%. It is a dark colour, so white text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Slate blue.

Colour values

#646AD2#646AD2
HEX#646AD2
RGBrgb(100, 106, 210)
RGB (0–1)0.3922, 0.4157, 0.8235
RGB percentages39.2%, 41.6%, 82.4%
HSLhsl(236.7, 55%, 60.8%)
HSV / HSBhsv(236.7, 52.4%, 82.4%)
CMYK52.4%, 49.5%, 0%, 17.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,580,946
CSS custom property--colour: #646AD2;

Brightness & contrast

Relative luminance0.17671WCAG 2.x, 0 is black and 1 is white
Perceived brightness120.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.63:1
Contrast with white4.63:1WCAG normal text: AA
Contrast with black4.53:1WCAG normal text: AA
Greyscale equivalent#707070
Inverted#9B952D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3879D6no red cones; affects about 1% of men; ΔE 15.7 from the original
Deuteranopia#2B70D0no green cones; the most common form, about 1% of men; ΔE 13.8 from the original
Tritanopia#348194no blue cones; rare, and affects men and women equally; ΔE 57.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.63:1WCAG large text: AAA
Contrast with black, large text4.53:1WCAG large text: AAA

Named colours

Slate blue · ΔE 10.6Royal blue · ΔE 10.7Medium purple · ΔE 12.6Medium slateblue · ΔE 18.3Dodgerblue · ΔE 21.4Dark slateblue · ΔE 22.2
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 10.63, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D2CC64
Analogous#64A1D2, #9564D2
Triadic#D2646A, #6AD264
Split complementary#D29564, #A1D264
Tetradic#D264A1, #D2CC64, #64D295

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#DBDCF4
Lighter +20%#B3B6E9
Lighter +10%#8C90DD
Darker −10%#3C44C7
Darker −20%#2F35A1
Darker −30%#23287A
Darker −40%#181B52
More saturated +25%#4B54EB
Less saturated −25%#7D80B9

Channel breakdown

R100
G106
B210
Red100 (39.2%)
Green106 (41.6%)
Blue210 (82.4%)
Hue236.73°
Saturation (HSL)55%
Lightness60.78%
Dominant channelBlue
Hex per channelR 64 · G 6A · B D2

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Every value on this page was computed from “646ad2” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.