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Recognised as Colour

#3F00CC

  • #3F00CC
  • Violet
  • Dark
  • Nearest: Medium blue

#3F00CC is a violet with RGB values 63, 0, 204 and HSL 259°, 100%, 40%. It is a dark colour, so white text on it reaches 10.1:1 contrast (AAA for normal text). The nearest named colour is Medium blue.

Colour values

#3F00CC#3F00CC
HEX#3F00CC
RGBrgb(63, 0, 204)
RGB (0–1)0.2471, 0, 0.8
RGB percentages24.7%, 0%, 80%
HSLhsl(258.5, 100%, 40%)
HSV / HSBhsv(258.5, 100%, 80%)
CMYK69.1%, 100%, 0%, 20%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,128,972
CSS custom property--colour: #3F00CC;

Brightness & contrast

Relative luminance0.05416WCAG 2.x, 0 is black and 1 is white
Perceived brightness77 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.08:1
Contrast with white10.08:1WCAG normal text: AAA
Contrast with black2.08:1WCAG normal text: Fail
Greyscale equivalent#1C1C1C
Inverted#C0FF33

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0048D1no red cones; affects about 1% of men; ΔE 34.2 from the original
Deuteranopia#003AC9no green cones; the most common form, about 1% of men; ΔE 27.3 from the original
Tritanopia#005277no blue cones; rare, and affects men and women equally; ΔE 95.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.08:1WCAG large text: AAA
Contrast with black, large text2.08:1WCAG large text: Fail

Named colours

Medium blue · ΔE 6.3Blue violet · ΔE 18.3Dark violet · ΔE 21.2Blue · ΔE 24.9Dark blue · ΔE 28Dark orchid · ΔE 30.3
Nearest named CSS colourMedium blue (#0000CD)ΔE 6.32, clearly different but related
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8DCC00
Analogous#0027CC, #A500CC
Triadic#CC3F00, #00CC3F
Split complementary#CCA500, #27CC00
Tetradic#CC0027, #8DCC00, #00CCA5

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B999FF
Lighter +30%#9566FF
Lighter +20%#7233FF
Lighter +10%#4F00FF
Darker −10%#2F0099
Darker −20%#1F0066
Darker −30%#100033
Darker −40%#000000
More saturated +25%#3F00CC
Less saturated −25%#4919B3

Channel breakdown

R63
G0
B204
Red63 (24.7%)
Green0 (0%)
Blue204 (80%)
Hue258.53°
Saturation (HSL)100%
Lightness40%
Dominant channelBlue
Hex per channelR 3F · G 00 · B CC

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Every value on this page was computed from “3f00cc” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.