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Recognised as Colour

#3F78DF

  • #3F78DF
  • Blue
  • Dark
  • Nearest: Dodgerblue

#3F78DF is a blue with RGB values 63, 120, 223 and HSL 219°, 71%, 56%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#3F78DF#3F78DF
HEX#3F78DF
RGBrgb(63, 120, 223)
RGB (0–1)0.2471, 0.4706, 0.8745
RGB percentages24.7%, 47.1%, 87.5%
HSLhsl(218.6, 71.4%, 56.1%)
HSV / HSBhsv(218.6, 71.7%, 87.5%)
CMYK71.7%, 46.2%, 0%, 12.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,159,711
CSS custom property--colour: #3F78DF;

Brightness & contrast

Relative luminance0.19817WCAG 2.x, 0 is black and 1 is white
Perceived brightness123.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.96:1
Contrast with white4.23:1WCAG normal text: Fail
Contrast with black4.96:1WCAG normal text: AA
Greyscale equivalent#737373
Inverted#C08720

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4283E3no red cones; affects about 1% of men; ΔE 6.8 from the original
Deuteranopia#1C74DDno green cones; the most common form, about 1% of men; ΔE 3.7 from the original
Tritanopia#0090A1no blue cones; rare, and affects men and women equally; ΔE 57.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.23:1WCAG large text: AA
Contrast with black, large text4.96:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 11.1Royal blue · ΔE 13.2Cornflower blue · ΔE 15Slate blue · ΔE 21.1Medium purple · ΔE 22.6Medium slateblue · ΔE 26.3
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 11.13, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DFA63F
Analogous#3FC8DF, #563FDF
Triadic#DF3F78, #78DF3F
Split complementary#DF563F, #C8DF3F
Tetradic#DF3FC8, #DFA63F, #3FDF56

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EEF3FC
Lighter +30%#C2D4F5
Lighter +20%#96B5EE
Lighter +10%#6B97E6
Darker −10%#225DC9
Darker −20%#1A499E
Darker −30%#133572
Darker −40%#0C2146
More saturated +25%#2370FB
Less saturated −25%#5B80C3

Channel breakdown

R63
G120
B223
Red63 (24.7%)
Green120 (47.1%)
Blue223 (87.5%)
Hue218.63°
Saturation (HSL)71.43%
Lightness56.08%
Dominant channelBlue
Hex per channelR 3F · G 78 · B DF

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Every value on this page was computed from “3f78df” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.