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Recognised as Colour

#3F64A5

  • #3F64A5
  • Blue
  • Dark
  • Nearest: Steel blue

#3F64A5 is a blue with RGB values 63, 100, 165 and HSL 218°, 45%, 45%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#3F64A5#3F64A5
HEX#3F64A5
RGBrgb(63, 100, 165)
RGB (0–1)0.2471, 0.3922, 0.6471
RGB percentages24.7%, 39.2%, 64.7%
HSLhsl(218.2, 44.7%, 44.7%)
HSV / HSBhsv(218.2, 61.8%, 64.7%)
CMYK61.8%, 39.4%, 0%, 35.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,154,533
CSS custom property--colour: #3F64A5;

Brightness & contrast

Relative luminance0.12888WCAG 2.x, 0 is black and 1 is white
Perceived brightness100.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.87:1
Contrast with white5.87:1WCAG normal text: AA
Contrast with black3.58:1WCAG normal text: Fail
Greyscale equivalent#616161
Inverted#C09B5A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#486AA8no red cones; affects about 1% of men; ΔE 3.2 from the original
Deuteranopia#3A60A4no green cones; the most common form, about 1% of men; ΔE 2.6 from the original
Tritanopia#00737Cno blue cones; rare, and affects men and women equally; ΔE 40.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.87:1WCAG large text: AAA
Contrast with black, large text3.58:1WCAG large text: AA

Named colours

Steel blue · ΔE 16.8Cornflower blue · ΔE 22Dark slateblue · ΔE 22.1Dodgerblue · ΔE 29.7Slate grey · ΔE 31.8Light slate grey · ΔE 32.5
Nearest named CSS colourSteel blue (#4682B4)ΔE 16.78, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A5803F
Analogous#3F97A5, #4D3FA5
Triadic#A53F64, #64A53F
Split complementary#A54D3F, #97A53F
Tetradic#A53F97, #A5803F, #3FA54D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C7D3E9
Lighter +30%#A2B7DB
Lighter +20%#7D9ACD
Lighter +10%#587DBF
Darker −10%#314E80
Darker −20%#23375B
Darker −30%#152136
Darker −40%#070B11
More saturated +25%#235CC2
Less saturated −25%#5C6C89

Channel breakdown

R63
G100
B165
Red63 (24.7%)
Green100 (39.2%)
Blue165 (64.7%)
Hue218.24°
Saturation (HSL)44.74%
Lightness44.71%
Dominant channelBlue
Hex per channelR 3F · G 64 · B A5

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Every value on this page was computed from “3f64a5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.