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Recognised as Colour

#4F66FF

  • #4F66FF
  • Blue
  • Dark
  • Nearest: Medium slateblue

#4F66FF is a blue with RGB values 79, 102, 255 and HSL 232°, 100%, 65%. It is a dark colour, so black text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#4F66FF#4F66FF
HEX#4F66FF
RGBrgb(79, 102, 255)
RGB (0–1)0.3098, 0.4, 1
RGB percentages31%, 40%, 100%
HSLhsl(232.2, 100%, 65.5%)
HSV / HSBhsv(232.2, 69%, 100%)
CMYK69%, 60%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,203,711
CSS custom property--colour: #4F66FF;

Brightness & contrast

Relative luminance0.18385WCAG 2.x, 0 is black and 1 is white
Perceived brightness124 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.68:1
Contrast with white4.49:1WCAG normal text: Fail
Contrast with black4.68:1WCAG normal text: AA
Greyscale equivalent#6C6C6C
Inverted#B09900

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#007FFFno red cones; affects about 1% of men; ΔE 22.6 from the original
Deuteranopia#006FFCno green cones; the most common form, about 1% of men; ΔE 12.1 from the original
Tritanopia#008DA9no blue cones; rare, and affects men and women equally; ΔE 82.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.49:1WCAG large text: AA
Contrast with black, large text4.68:1WCAG large text: AAA

Named colours

Medium slateblue · ΔE 13.4Royal blue · ΔE 19.5Slate blue · ΔE 21.7Medium purple · ΔE 29.1Blue violet · ΔE 30.7Dark orchid · ΔE 31.6
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 13.37, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFE84F
Analogous#4FBEFF, #904FFF
Triadic#FF4F66, #66FF4F
Split complementary#FF904F, #BEFF4F
Tetradic#FF4FBE, #FFE84F, #4FFF90

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E8EBFF
Lighter +20%#B5BFFF
Lighter +10%#8292FF
Darker −10%#1C3AFF
Darker −20%#001EE8
Darker −30%#0018B5
Darker −40%#001182
More saturated +25%#4F66FF
Less saturated −25%#6576E9

Channel breakdown

R79
G102
B255
Red79 (31%)
Green102 (40%)
Blue255 (100%)
Hue232.16°
Saturation (HSL)100%
Lightness65.49%
Dominant channelBlue
Hex per channelR 4F · G 66 · B FF

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Every value on this page was computed from “4f66ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.