Recognised as Colour

#3778DA

#3778DA
Blue
Dark
Nearest: Dodgerblue

#3778DA is a blue with RGB values 55, 120, 218 and HSL 216°, 69%, 54%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#3778DA#3778DA

HEX#3778DA

RGBrgb(55, 120, 218)

RGB (0–1)0.2157, 0.4706, 0.8549

RGB percentages21.6%, 47.1%, 85.5%

HSLhsl(216.1, 68.8%, 53.5%)

HSV / HSBhsv(216.1, 74.8%, 85.5%)

CMYK74.8%, 45%, 0%, 14.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer3,635,418

CSS custom property--colour: #3778DA;

Brightness & contrast

Relative luminance0.19307WCAG 2.x, 0 is black and 1 is white

Perceived brightness121.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.86:1

Contrast with white4.32:1WCAG normal text: Fail

Contrast with black4.86:1WCAG normal text: AA

Greyscale equivalent#717171

Inverted#C88725

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4582DEno red cones; affects about 1% of men; ΔE 5.6 from the original

Deuteranopia#2273D8no green cones; the most common form, about 1% of men; ΔE 3.1 from the original

Tritanopia#008F9Eno blue cones; rare, and affects men and women equally; ΔE 55.5 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text4.32:1WCAG large text: AA

Contrast with black, large text4.86:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 11.5 Cornflower blue · ΔE 13.4 Royal blue · ΔE 16.4 Slate blue · ΔE 23.8 Medium purple · ΔE 24.8 Dark slateblue · ΔE 27.9

Nearest named CSS colourDodgerblue (#1E90FF)ΔE 11.46, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#DA9937

Analogous#37CADA, #4737DA

Triadic#DA3778, #78DA37

Split complementary#DA4737, #CADA37

Tetradic#DA37CA, #DA9937, #37DA47

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#E3ECFA

Lighter +30%#B8CFF2

Lighter +20%#8DB2EA

Lighter +10%#6295E2

Darker −10%#2360BB

Darker −20%#1B4A90

Darker −30%#133465

Darker −40%#0B1E3A

More saturated +25%#1972F8

Less saturated −25%#557EBC

Channel breakdown

R55

G120

B218

Red55 (21.6%)

Green120 (47.1%)

Blue218 (85.5%)

Hue216.07°

Saturation (HSL)68.78%

Lightness53.53%

Dominant channelBlue

Hex per channelR 37 · G 78 · B DA

Keep nerding

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#3778DA

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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