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Colour

#3F80FF

  • #3F80FF
  • Blue
  • Dark
  • Nearest: Royal blue

#3F80FF is a blue with RGB values 63, 128, 255 and HSL 220°, 100%, 62%. It is a dark colour, so black text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#3F80FF#3F80FF
HEX#3F80FF
RGBrgb(63, 128, 255)
RGB (0–1)0.2471, 0.502, 1
RGB percentages24.7%, 50.2%, 100%
HSLhsl(219.7, 100%, 62.4%)
HSV / HSBhsv(219.7, 75.3%, 100%)
CMYK75.3%, 49.8%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,161,791
CSS custom property--colour: #3F80FF;

Brightness & contrast

Relative luminance0.23715WCAG 2.x, 0 is black and 1 is white
Perceived brightness135 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.74:1
Contrast with white3.66:1WCAG normal text: Fail
Contrast with black5.74:1WCAG normal text: AA
Greyscale equivalent#7B7B7B
Inverted#C07F00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#308FFFno red cones; affects about 1% of men; ΔE 12.7 from the original
Deuteranopia#007DFCno green cones; the most common form, about 1% of men; ΔE 4.1 from the original
Tritanopia#009FB3no blue cones; rare, and affects men and women equally; ΔE 69.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.66:1WCAG large text: AA
Contrast with black, large text5.74:1WCAG large text: AAA

Named colours

Royal blue · ΔE 9.6Dodgerblue · ΔE 14.2Medium slateblue · ΔE 19.3Slate blue · ΔE 20.5Medium purple · ΔE 23.8Cornflower blue · ΔE 24.6
Nearest named CSS colourRoyal blue (#4169E1)ΔE 9.63, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFBE3F
Analogous#3FE0FF, #5E3FFF
Triadic#FF3F80, #80FF3F
Split complementary#FF5E3F, #E0FF3F
Tetradic#FF3FE0, #FFBE3F, #3FFF5E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D8E5FF
Lighter +20%#A5C3FF
Lighter +10%#72A2FF
Darker −10%#0C5EFF
Darker −20%#0049D8
Darker −30%#0038A5
Darker −40%#002772
More saturated +25%#3F80FF
Less saturated −25%#5788E7

Channel breakdown

R63
G128
B255
Red63 (24.7%)
Green128 (50.2%)
Blue255 (100%)
Hue219.69°
Saturation (HSL)100%
Lightness62.35%
Dominant channelBlue
Hex per channelR 3F · G 80 · B FF

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Every value on this page was computed from “3f80ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.