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Recognised as Colour

#646CD2

  • #646CD2
  • Blue
  • Dark
  • Nearest: Royal blue

#646CD2 is a blue with RGB values 100, 108, 210 and HSL 236°, 55%, 61%. It is a dark colour, so black text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#646CD2#646CD2
HEX#646CD2
RGBrgb(100, 108, 210)
RGB (0–1)0.3922, 0.4235, 0.8235
RGB percentages39.2%, 42.4%, 82.4%
HSLhsl(235.6, 55%, 60.8%)
HSV / HSBhsv(235.6, 52.4%, 82.4%)
CMYK52.4%, 48.6%, 0%, 17.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,581,458
CSS custom property--colour: #646CD2;

Brightness & contrast

Relative luminance0.18088WCAG 2.x, 0 is black and 1 is white
Perceived brightness121.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.62:1
Contrast with white4.55:1WCAG normal text: AA
Contrast with black4.62:1WCAG normal text: AA
Greyscale equivalent#727272
Inverted#9B932D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3C7BD6no red cones; affects about 1% of men; ΔE 15.2 from the original
Deuteranopia#2F72D0no green cones; the most common form, about 1% of men; ΔE 13.3 from the original
Tritanopia#338295no blue cones; rare, and affects men and women equally; ΔE 56.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.55:1WCAG large text: AAA
Contrast with black, large text4.62:1WCAG large text: AAA

Named colours

Royal blue · ΔE 11.6Slate blue · ΔE 12.1Medium purple · ΔE 13.2Medium slateblue · ΔE 19.7Dodgerblue · ΔE 20.6Cornflower blue · ΔE 20.7
Nearest named CSS colourRoyal blue (#4169E1)ΔE 11.63, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D2CA64
Analogous#64A3D2, #9364D2
Triadic#D2646C, #6CD264
Split complementary#D29364, #A3D264
Tetradic#D264A3, #D2CA64, #64D293

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#DBDCF4
Lighter +20%#B3B7E9
Lighter +10%#8C91DD
Darker −10%#3C47C7
Darker −20%#2F37A1
Darker −30%#232A7A
Darker −40%#181C52
More saturated +25%#4B57EB
Less saturated −25%#7D81B9

Channel breakdown

R100
G108
B210
Red100 (39.2%)
Green108 (42.4%)
Blue210 (82.4%)
Hue235.64°
Saturation (HSL)55%
Lightness60.78%
Dominant channelBlue
Hex per channelR 64 · G 6C · B D2

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Every value on this page was computed from “646cd2” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.