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Recognised as Colour

#3777BB

  • #3777BB
  • Blue
  • Dark
  • Nearest: Steel blue

#3777BB is a blue with RGB values 55, 119, 187 and HSL 211°, 55%, 47%. It is a dark colour, so white text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#3777BB#3777BB
HEX#3777BB
RGBrgb(55, 119, 187)
RGB (0–1)0.2157, 0.4667, 0.7333
RGB percentages21.6%, 46.7%, 73.3%
HSLhsl(210.9, 54.5%, 47.5%)
HSV / HSBhsv(210.9, 70.6%, 73.3%)
CMYK70.6%, 36.4%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,635,131
CSS custom property--colour: #3777BB;

Brightness & contrast

Relative luminance0.17594WCAG 2.x, 0 is black and 1 is white
Perceived brightness114.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.65:1
Contrast with white4.65:1WCAG normal text: AA
Contrast with black4.52:1WCAG normal text: AA
Greyscale equivalent#6E6E6E
Inverted#C88844

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#587BBEno red cones; affects about 1% of men; ΔE 6.2 from the original
Deuteranopia#456FBAno green cones; the most common form, about 1% of men; ΔE 7.5 from the original
Tritanopia#008790no blue cones; rare, and affects men and women equally; ΔE 40.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.65:1WCAG large text: AAA
Contrast with black, large text4.52:1WCAG large text: AAA

Named colours

Steel blue · ΔE 12Cornflower blue · ΔE 16.5Dodgerblue · ΔE 25.2Dark slateblue · ΔE 29.9Deep skyblue · ΔE 30.9Slate grey · ΔE 31.7
Nearest named CSS colourSteel blue (#4682B4)ΔE 11.98, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BB7B37
Analogous#37B9BB, #3937BB
Triadic#BB3777, #77BB37
Split complementary#BB3937, #B9BB37
Tetradic#BB37B9, #BB7B37, #37BB39

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CEDEF0
Lighter +30%#A6C5E5
Lighter +20%#7FABD9
Lighter +10%#5791CE
Darker −10%#2B5E94
Darker −20%#20456C
Darker −30%#142C45
Darker −40%#09131D
More saturated +25%#1976D9
Less saturated −25%#55789D

Channel breakdown

R55
G119
B187
Red55 (21.6%)
Green119 (46.7%)
Blue187 (73.3%)
Hue210.91°
Saturation (HSL)54.55%
Lightness47.45%
Dominant channelBlue
Hex per channelR 37 · G 77 · B BB

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Every value on this page was computed from “3777bb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.