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Recognised as Colour

#647DD2

  • #647DD2
  • Blue
  • Dark
  • Nearest: Cornflower blue

#647DD2 is a blue with RGB values 100, 125, 210 and HSL 226°, 55%, 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

#647DD2#647DD2
HEX#647DD2
RGBrgb(100, 125, 210)
RGB (0–1)0.3922, 0.4902, 0.8235
RGB percentages39.2%, 49%, 82.4%
HSLhsl(226.4, 55%, 60.8%)
HSV / HSBhsv(226.4, 52.4%, 82.4%)
CMYK52.4%, 40.5%, 0%, 17.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,585,810
CSS custom property--colour: #647DD2;

Brightness & contrast

Relative luminance0.2203WCAG 2.x, 0 is black and 1 is white
Perceived brightness131.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.41:1
Contrast with white3.88:1WCAG normal text: Fail
Contrast with black5.41:1WCAG normal text: AA
Greyscale equivalent#7E7E7E
Inverted#9B822D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5A86D5no red cones; affects about 1% of men; ΔE 7.1 from the original
Deuteranopia#4E7DD0no green cones; the most common form, about 1% of men; ΔE 5.4 from the original
Tritanopia#308F9Dno blue cones; rare, and affects men and women equally; ΔE 48.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.88:1WCAG large text: AA
Contrast with black, large text5.41:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 10.1Dodgerblue · ΔE 18.2Medium purple · ΔE 22.1Royal blue · ΔE 22.6Steel blue · ΔE 24Slate blue · ΔE 25.3
Nearest named CSS colourCornflower blue (#6495ED)ΔE 10.05, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D2B964
Analogous#64B4D2, #8264D2
Triadic#D2647D, #7DD264
Split complementary#D28264, #B4D264
Tetradic#D264B4, #D2B964, #64D282

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#DBE0F4
Lighter +20%#B3BFE9
Lighter +10%#8C9EDD
Darker −10%#3C5CC7
Darker −20%#2F49A1
Darker −30%#23377A
Darker −40%#182552
More saturated +25%#4B6FEB
Less saturated −25%#7D8BB9

Channel breakdown

R100
G125
B210
Red100 (39.2%)
Green125 (49%)
Blue210 (82.4%)
Hue226.36°
Saturation (HSL)55%
Lightness60.78%
Dominant channelBlue
Hex per channelR 64 · G 7D · B D2

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Every value on this page was computed from “647dd2” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.