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Recognised as Colour

#646FFF

  • #646FFF
  • Blue
  • Dark
  • Nearest: Medium slateblue

#646FFF is a blue with RGB values 100, 111, 255 and HSL 236°, 100%, 70%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#646FFF#646FFF
HEX#646FFF
RGBrgb(100, 111, 255)
RGB (0–1)0.3922, 0.4353, 1
RGB percentages39.2%, 43.5%, 100%
HSLhsl(235.7, 100%, 69.6%)
HSV / HSBhsv(235.7, 60.8%, 100%)
CMYK60.8%, 56.5%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,582,271
CSS custom property--colour: #646FFF;

Brightness & contrast

Relative luminance0.21298WCAG 2.x, 0 is black and 1 is white
Perceived brightness132.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.26:1
Contrast with white3.99:1WCAG normal text: Fail
Contrast with black5.26:1WCAG normal text: AA
Greyscale equivalent#777777
Inverted#9B9000

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0086FFno red cones; affects about 1% of men; ΔE 23.6 from the original
Deuteranopia#0079FCno green cones; the most common form, about 1% of men; ΔE 16 from the original
Tritanopia#0092ACno blue cones; rare, and affects men and women equally; ΔE 79.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.99:1WCAG large text: AA
Contrast with black, large text5.26:1WCAG large text: AAA

Named colours

Medium slateblue · ΔE 8.4Royal blue · ΔE 15.1Slate blue · ΔE 17.4Medium purple · ΔE 23.1Dodgerblue · ΔE 30.3Dark orchid · ΔE 31.7
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 8.4, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFF464
Analogous#64BCFF, #A664FF
Triadic#FF646F, #6FFF64
Split complementary#FFA764, #BCFF64
Tetradic#FF64BD, #FFF464, #64FFA7

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FDFDFF
Lighter +20%#CACEFF
Lighter +10%#979EFF
Darker −10%#3140FF
Darker −20%#0012FD
Darker −30%#000ECA
Darker −40%#000B97
More saturated +25%#646FFF
Less saturated −25%#7780EC

Channel breakdown

R100
G111
B255
Red100 (39.2%)
Green111 (43.5%)
Blue255 (100%)
Hue235.74°
Saturation (HSL)100%
Lightness69.61%
Dominant channelBlue
Hex per channelR 64 · G 6F · B FF

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Every value on this page was computed from “646fff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.