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Recognised as Colour

#647ADA

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

#647ADA is a blue with RGB values 100, 122, 218 and HSL 229°, 61%, 62%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#647ADA#647ADA
HEX#647ADA
RGBrgb(100, 122, 218)
RGB (0–1)0.3922, 0.4784, 0.8549
RGB percentages39.2%, 47.8%, 85.5%
HSLhsl(228.8, 61.5%, 62.4%)
HSV / HSBhsv(228.8, 54.1%, 85.5%)
CMYK54.1%, 44%, 0%, 14.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,585,050
CSS custom property--colour: #647ADA;

Brightness & contrast

Relative luminance0.2169WCAG 2.x, 0 is black and 1 is white
Perceived brightness130.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.34:1
Contrast with white3.93:1WCAG normal text: Fail
Contrast with black5.34:1WCAG normal text: AA
Greyscale equivalent#7C7C7C
Inverted#9B8525

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5086DEno red cones; affects about 1% of men; ΔE 10.2 from the original
Deuteranopia#427CD8no green cones; the most common form, about 1% of men; ΔE 8.2 from the original
Tritanopia#268F9Fno blue cones; rare, and affects men and women equally; ΔE 55.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.93:1WCAG large text: AA
Contrast with black, large text5.34:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 13.2Dodgerblue · ΔE 16Royal blue · ΔE 16.2Medium purple · ΔE 17.6Slate blue · ΔE 19.6Medium slateblue · ΔE 25.7
Nearest named CSS colourCornflower blue (#6495ED)ΔE 13.22, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DAC464
Analogous#64B5DA, #8964DA
Triadic#DA647A, #7ADA64
Split complementary#DA8964, #B5DA64
Tetradic#DA64B5, #DAC464, #64DA89

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E0E4F7
Lighter +20%#B6C1EE
Lighter +10%#8D9DE4
Darker −10%#3B57D0
Darker −20%#2A42AE
Darker −30%#203385
Darker −40%#16235C
More saturated +25%#4C6BF2
Less saturated −25%#7C89C2

Channel breakdown

R100
G122
B218
Red100 (39.2%)
Green122 (47.8%)
Blue218 (85.5%)
Hue228.81°
Saturation (HSL)61.46%
Lightness62.35%
Dominant channelBlue
Hex per channelR 64 · G 7A · B DA

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