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Colour

#3781EA

  • #3781EA
  • Blue
  • Dark
  • Nearest: Dodgerblue

#3781EA is a blue with RGB values 55, 129, 234 and HSL 215°, 81%, 57%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#3781EA#3781EA
HEX#3781EA
RGBrgb(55, 129, 234)
RGB (0–1)0.2157, 0.5059, 0.9176
RGB percentages21.6%, 50.6%, 91.8%
HSLhsl(215.2, 81%, 56.7%)
HSV / HSBhsv(215.2, 76.5%, 91.8%)
CMYK76.5%, 44.9%, 0%, 8.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,637,738
CSS custom property--colour: #3781EA;

Brightness & contrast

Relative luminance0.22453WCAG 2.x, 0 is black and 1 is white
Perceived brightness130.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.49:1
Contrast with white3.82:1WCAG normal text: Fail
Contrast with black5.49:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#C87E15

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4A8BEEno red cones; affects about 1% of men; ΔE 5.6 from the original
Deuteranopia#217BE8no green cones; the most common form, about 1% of men; ΔE 3.6 from the original
Tritanopia#009AAAno blue cones; rare, and affects men and women equally; ΔE 58.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.82:1WCAG large text: AA
Contrast with black, large text5.49:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 7Cornflower blue · ΔE 13.3Royal blue · ΔE 15.6Slate blue · ΔE 24.6Medium purple · ΔE 25.3Medium slateblue · ΔE 28.4
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 7.05, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#EAA037
Analogous#37DBEA, #4637EA
Triadic#EA3781, #81EA37
Split complementary#EA4637, #DBEA37
Tetradic#EA37DB, #EAA037, #37EA46

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F0F5FD
Lighter +30%#C1D8F9
Lighter +20%#93BBF4
Lighter +10%#659EEF
Darker −10%#1766D7
Darker −20%#1250A9
Darker −30%#0D3A7B
Darker −40%#08254D
More saturated +25%#227DFF
Less saturated −25%#5386CE

Channel breakdown

R55
G129
B234
Red55 (21.6%)
Green129 (50.6%)
Blue234 (91.8%)
Hue215.2°
Saturation (HSL)81%
Lightness56.67%
Dominant channelBlue
Hex per channelR 37 · G 81 · B EA

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Every value on this page was computed from “3781ea” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.