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Recognised as Colour

#5166FF

  • #5166FF
  • Blue
  • Dark
  • Nearest: Medium slateblue

#5166FF is a blue with RGB values 81, 102, 255 and HSL 233°, 100%, 66%. 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

#5166FF#5166FF
HEX#5166FF
RGBrgb(81, 102, 255)
RGB (0–1)0.3176, 0.4, 1
RGB percentages31.8%, 40%, 100%
HSLhsl(232.8, 100%, 65.9%)
HSV / HSBhsv(232.8, 68.2%, 100%)
CMYK68.2%, 60%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,334,783
CSS custom property--colour: #5166FF;

Brightness & contrast

Relative luminance0.18472WCAG 2.x, 0 is black and 1 is white
Perceived brightness124.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.69:1
Contrast with white4.47:1WCAG normal text: Fail
Contrast with black4.69:1WCAG normal text: AA
Greyscale equivalent#6D6D6D
Inverted#AE9900

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#007FFFno red cones; affects about 1% of men; ΔE 22.8 from the original
Deuteranopia#006FFCno green cones; the most common form, about 1% of men; ΔE 12.4 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 text4.47:1WCAG large text: AA
Contrast with black, large text4.69:1WCAG large text: AAA

Named colours

Medium slateblue · ΔE 13.2Royal blue · ΔE 19.6Slate blue · ΔE 21.6Medium purple · ΔE 29Blue violet · ΔE 30.5Dark orchid · ΔE 31.3
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 13.17, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFEA51
Analogous#51BDFF, #9351FF
Triadic#FF5166, #66FF51
Split complementary#FF9351, #BDFF51
Tetradic#FF51BD, #FFEA51, #51FF93

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#EAEDFF
Lighter +20%#B7C0FF
Lighter +10%#8493FF
Darker −10%#1E39FF
Darker −20%#001CEA
Darker −30%#0016B7
Darker −40%#001084
More saturated +25%#5166FF
Less saturated −25%#6777E9

Channel breakdown

R81
G102
B255
Red81 (31.8%)
Green102 (40%)
Blue255 (100%)
Hue232.76°
Saturation (HSL)100%
Lightness65.88%
Dominant channelBlue
Hex per channelR 51 · G 66 · B FF

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Every value on this page was computed from “5166ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.