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Recognised as Colour

#3566DC

  • #3566DC
  • Blue
  • Dark
  • Nearest: Royal blue

#3566DC is a blue with RGB values 53, 102, 220 and HSL 222°, 70%, 54%. It is a dark colour, so white text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#3566DC#3566DC
HEX#3566DC
RGBrgb(53, 102, 220)
RGB (0–1)0.2078, 0.4, 0.8627
RGB percentages20.8%, 40%, 86.3%
HSLhsl(222.4, 70.5%, 53.5%)
HSV / HSBhsv(222.4, 75.9%, 86.3%)
CMYK75.9%, 53.6%, 0%, 13.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,499,740
CSS custom property--colour: #3566DC;

Brightness & contrast

Relative luminance0.15427WCAG 2.x, 0 is black and 1 is white
Perceived brightness111.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.14:1
Contrast with white5.14:1WCAG normal text: AA
Contrast with black4.09:1WCAG normal text: Fail
Greyscale equivalent#646464
Inverted#CA9923

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0076E0no red cones; affects about 1% of men; ΔE 13 from the original
Deuteranopia#0066DAno green cones; the most common form, about 1% of men; ΔE 4.3 from the original
Tritanopia#008397no blue cones; rare, and affects men and women equally; ΔE 66.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.14:1WCAG large text: AAA
Contrast with black, large text4.09:1WCAG large text: AA

Named colours

Royal blue · ΔE 2.1Slate blue · ΔE 13.4Medium slateblue · ΔE 17.2Dodgerblue · ΔE 20Medium purple · ΔE 21.1Cornflower blue · ΔE 27.2
Nearest named CSS colourRoyal blue (#4169E1)ΔE 2.13, below the just-noticeable difference
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DCAB35
Analogous#35B9DC, #5835DC
Triadic#DC3566, #66DC35
Split complementary#DC5835, #B9DC35
Tetradic#DC35B9, #DCAB35, #35DC58

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E3EAFA
Lighter +30%#B7C9F3
Lighter +20%#8CA8EB
Lighter +10%#6087E4
Darker −10%#214FBD
Darker −20%#193D92
Darker −30%#122B66
Darker −40%#0A183B
More saturated +25%#175AFA
Less saturated −25%#5372BE

Channel breakdown

R53
G102
B220
Red53 (20.8%)
Green102 (40%)
Blue220 (86.3%)
Hue222.4°
Saturation (HSL)70.46%
Lightness53.53%
Dominant channelBlue
Hex per channelR 35 · G 66 · B DC

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Every value on this page was computed from “3566dc” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.