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Recognised as Colour

#3F80D0

  • #3F80D0
  • Blue
  • Dark
  • Nearest: Cornflower blue

#3F80D0 is a blue with RGB values 63, 128, 208 and HSL 213°, 61%, 53%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#3F80D0#3F80D0
HEX#3F80D0
RGBrgb(63, 128, 208)
RGB (0–1)0.2471, 0.502, 0.8157
RGB percentages24.7%, 50.2%, 81.6%
HSLhsl(213.1, 60.7%, 53.1%)
HSV / HSBhsv(213.1, 69.7%, 81.6%)
CMYK69.7%, 38.5%, 0%, 18.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,161,744
CSS custom property--colour: #3F80D0;

Brightness & contrast

Relative luminance0.21049WCAG 2.x, 0 is black and 1 is white
Perceived brightness125.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.21:1
Contrast with white4.03:1WCAG normal text: Fail
Contrast with black5.21:1WCAG normal text: AA
Greyscale equivalent#787878
Inverted#C07F2F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5B86D3no red cones; affects about 1% of men; ΔE 5.1 from the original
Deuteranopia#4578CEno green cones; the most common form, about 1% of men; ΔE 6 from the original
Tritanopia#00939Eno blue cones; rare, and affects men and women equally; ΔE 46.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.03:1WCAG large text: AA
Contrast with black, large text5.21:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 9.9Dodgerblue · ΔE 17.8Steel blue · ΔE 18Royal blue · ΔE 27.9Dark slateblue · ΔE 30.6Deep skyblue · ΔE 30.7
Nearest named CSS colourCornflower blue (#6495ED)ΔE 9.88, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D08F3F
Analogous#3FC8D0, #473FD0
Triadic#D03F80, #80D03F
Split complementary#D0473F, #C8D03F
Tetradic#D03FC8, #D08F3F, #3FD047

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E3ECF8
Lighter +30%#BAD1EE
Lighter +20%#91B6E4
Lighter +10%#689BDA
Darker −10%#2B67B1
Darker −20%#214F88
Darker −30%#17375F
Darker −40%#0D1F36
More saturated +25%#217DEE
Less saturated −25%#5D83B2

Channel breakdown

R63
G128
B208
Red63 (24.7%)
Green128 (50.2%)
Blue208 (81.6%)
Hue213.1°
Saturation (HSL)60.67%
Lightness53.14%
Dominant channelBlue
Hex per channelR 3F · G 80 · B D0

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Every value on this page was computed from “3f80d0” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.