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Recognised as Colour

#647DD4

  • #647DD4
  • Blue
  • Dark
  • Nearest: Cornflower blue

#647DD4 is a blue with RGB values 100, 125, 212 and HSL 227°, 57%, 61%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#647DD4#647DD4
HEX#647DD4
RGBrgb(100, 125, 212)
RGB (0–1)0.3922, 0.4902, 0.8314
RGB percentages39.2%, 49%, 83.1%
HSLhsl(226.6, 56.6%, 61.2%)
HSV / HSBhsv(226.6, 52.8%, 83.1%)
CMYK52.8%, 41%, 0%, 16.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,585,812
CSS custom property--colour: #647DD4;

Brightness & contrast

Relative luminance0.2213WCAG 2.x, 0 is black and 1 is white
Perceived brightness131.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.43:1
Contrast with white3.87:1WCAG normal text: Fail
Contrast with black5.43:1WCAG normal text: AA
Greyscale equivalent#7E7E7E
Inverted#9B822B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5987D7no red cones; affects about 1% of men; ΔE 7.9 from the original
Deuteranopia#4C7DD2no green cones; the most common form, about 1% of men; ΔE 5.7 from the original
Tritanopia#2D909Eno blue cones; rare, and affects men and women equally; ΔE 50.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.87:1WCAG large text: AA
Contrast with black, large text5.43:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 10.1Dodgerblue · ΔE 17.5Medium purple · ΔE 21.3Royal blue · ΔE 21.5Slate blue · ΔE 24.4Steel blue · ΔE 25.1
Nearest named CSS colourCornflower blue (#6495ED)ΔE 10.14, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D4BB64
Analogous#64B5D4, #8364D4
Triadic#D4647D, #7DD464
Split complementary#D48364, #B5D464
Tetradic#D464B5, #D4BB64, #64D483

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#DCE1F5
Lighter +20%#B4C0EA
Lighter +10%#8C9EDF
Darker −10%#3C5CC9
Darker −20%#2E48A4
Darker −30%#23377C
Darker −40%#172555
More saturated +25%#4B6FED
Less saturated −25%#7D8BBB

Channel breakdown

R100
G125
B212
Red100 (39.2%)
Green125 (49%)
Blue212 (83.1%)
Hue226.61°
Saturation (HSL)56.57%
Lightness61.18%
Dominant channelBlue
Hex per channelR 64 · G 7D · B D4

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Every value on this page was computed from “647dd4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.