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Recognised as Colour

#647DB6

  • #647DB6
  • Blue
  • Dark
  • Nearest: Steel blue

#647DB6 is a blue with RGB values 100, 125, 182 and HSL 222°, 36%, 55%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#647DB6#647DB6
HEX#647DB6
RGBrgb(100, 125, 182)
RGB (0–1)0.3922, 0.4902, 0.7137
RGB percentages39.2%, 49%, 71.4%
HSLhsl(221.7, 36%, 55.3%)
HSV / HSBhsv(221.7, 45.1%, 71.4%)
CMYK45.1%, 31.3%, 0%, 28.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,585,782
CSS custom property--colour: #647DB6;

Brightness & contrast

Relative luminance0.20754WCAG 2.x, 0 is black and 1 is white
Perceived brightness126.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.15:1
Contrast with white4.08:1WCAG normal text: Fail
Contrast with black5.15:1WCAG normal text: AA
Greyscale equivalent#7C7C7C
Inverted#9B8249

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6882B8no red cones; affects about 1% of men; ΔE 2.7 from the original
Deuteranopia#607AB5no green cones; the most common form, about 1% of men; ΔE 1.7 from the original
Tritanopia#468991no blue cones; rare, and affects men and women equally; ΔE 33.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.08:1WCAG large text: AA
Contrast with black, large text5.15:1WCAG large text: AAA

Named colours

Steel blue · ΔE 10.5Cornflower blue · ΔE 19.1Light slate grey · ΔE 23.7Slate grey · ΔE 23.9Dark slateblue · ΔE 30.8Dodgerblue · ΔE 31.4
Nearest named CSS colourSteel blue (#4682B4)ΔE 10.49, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B69D64
Analogous#64A6B6, #7464B6
Triadic#B6647D, #7DB664
Split complementary#B67464, #A6B664
Tetradic#B664A6, #B69D64, #64B674

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EFF1F7
Lighter +30%#CCD4E7
Lighter +20%#A9B7D7
Lighter +10%#879AC6
Darker −10%#4A639D
Darker −20%#3A4D7A
Darker −30%#293758
Darker −40%#192235
More saturated +25%#4872D3
Less saturated −25%#81889A

Channel breakdown

R100
G125
B182
Red100 (39.2%)
Green125 (49%)
Blue182 (71.4%)
Hue221.71°
Saturation (HSL)35.96%
Lightness55.29%
Dominant channelBlue
Hex per channelR 64 · G 7D · B B6

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Every value on this page was computed from “647db6” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.