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Recognised as Colour

#3F65C3

  • #3F65C3
  • Blue
  • Dark
  • Nearest: Royal blue

#3F65C3 is a blue with RGB values 63, 101, 195 and HSL 223°, 52%, 51%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#3F65C3#3F65C3
HEX#3F65C3
RGBrgb(63, 101, 195)
RGB (0–1)0.2471, 0.3961, 0.7647
RGB percentages24.7%, 39.6%, 76.5%
HSLhsl(222.7, 52.4%, 50.6%)
HSV / HSBhsv(222.7, 67.7%, 76.5%)
CMYK67.7%, 48.2%, 0%, 23.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,154,819
CSS custom property--colour: #3F65C3;

Brightness & contrast

Relative luminance0.14304WCAG 2.x, 0 is black and 1 is white
Perceived brightness107.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.44:1
Contrast with white5.44:1WCAG normal text: AA
Contrast with black3.86:1WCAG normal text: Fail
Greyscale equivalent#646464
Inverted#C09A3C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3370C6no red cones; affects about 1% of men; ΔE 8.5 from the original
Deuteranopia#1264C1no green cones; the most common form, about 1% of men; ΔE 5.5 from the original
Tritanopia#007B8Ano blue cones; rare, and affects men and women equally; ΔE 55 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.44:1WCAG large text: AAA
Contrast with black, large text3.86:1WCAG large text: AA

Named colours

Royal blue · ΔE 15.1Slate blue · ΔE 18.9Dodgerblue · ΔE 19.5Cornflower blue · ΔE 19.6Dark slateblue · ΔE 19.6Medium purple · ΔE 21.9
Nearest named CSS colourRoyal blue (#4169E1)ΔE 15.09, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C39D3F
Analogous#3FA7C3, #5B3FC3
Triadic#C33F65, #65C33F
Split complementary#C35B3F, #A7C33F
Tetradic#C33FA7, #C39D3F, #3FC35B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DAE2F4
Lighter +30%#B4C3E7
Lighter +20%#8DA3DB
Lighter +10%#6684CF
Darker −10%#31509E
Darker −20%#253D77
Darker −30%#192950
Darker −40%#0D1529
More saturated +25%#1F58E3
Less saturated −25%#5F72A3

Channel breakdown

R63
G101
B195
Red63 (24.7%)
Green101 (39.6%)
Blue195 (76.5%)
Hue222.73°
Saturation (HSL)52.38%
Lightness50.59%
Dominant channelBlue
Hex per channelR 3F · G 65 · B C3

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Every value on this page was computed from “3f65c3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.