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Recognised as Colour

#646CBF

  • #646CBF
  • Blue
  • Dark
  • Nearest: Cornflower blue

#646CBF is a blue with RGB values 100, 108, 191 and HSL 235°, 42%, 57%. It is a dark colour, so white text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#646CBF#646CBF
HEX#646CBF
RGBrgb(100, 108, 191)
RGB (0–1)0.3922, 0.4235, 0.749
RGB percentages39.2%, 42.4%, 74.9%
HSLhsl(234.7, 41.6%, 57.1%)
HSV / HSBhsv(234.7, 47.6%, 74.9%)
CMYK47.6%, 43.5%, 0%, 25.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,581,439
CSS custom property--colour: #646CBF;

Brightness & contrast

Relative luminance0.17196WCAG 2.x, 0 is black and 1 is white
Perceived brightness118.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.73:1
Contrast with white4.73:1WCAG normal text: AA
Contrast with black4.44:1WCAG normal text: Fail
Greyscale equivalent#707070
Inverted#9B9340

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4B77C2no red cones; affects about 1% of men; ΔE 11.4 from the original
Deuteranopia#4470BDno green cones; the most common form, about 1% of men; ΔE 10 from the original
Tritanopia#437D8Cno blue cones; rare, and affects men and women equally; ΔE 45.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.73:1WCAG large text: AAA
Contrast with black, large text4.44:1WCAG large text: AA

Named colours

Cornflower blue · ΔE 17.4Dark slateblue · ΔE 19Medium purple · ΔE 19.3Slate blue · ΔE 21.4Royal blue · ΔE 21.7Dodgerblue · ΔE 23.6
Nearest named CSS colourCornflower blue (#6495ED)ΔE 17.44, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BFB764
Analogous#6499BF, #8A64BF
Triadic#BF646C, #6CBF64
Split complementary#BF8A64, #99BF64
Tetradic#BF6499, #BFB764, #64BF8A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F4F5FB
Lighter +30%#D0D3EC
Lighter +20%#ACB0DD
Lighter +10%#888ECE
Darker −10%#464FAA
Darker −20%#373E86
Darker −30%#282D62
Darker −40%#191D3E
More saturated +25%#4955DA
Less saturated −25%#7F83A4

Channel breakdown

R100
G108
B191
Red100 (39.2%)
Green108 (42.4%)
Blue191 (74.9%)
Hue234.73°
Saturation (HSL)41.55%
Lightness57.06%
Dominant channelBlue
Hex per channelR 64 · G 6C · B BF

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