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Recognised as Colour

#5166D7

  • #5166D7
  • Blue
  • Dark
  • Nearest: Royal blue

#5166D7 is a blue with RGB values 81, 102, 215 and HSL 231°, 63%, 58%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#5166D7#5166D7
HEX#5166D7
RGBrgb(81, 102, 215)
RGB (0–1)0.3176, 0.4, 0.8431
RGB percentages31.8%, 40%, 84.3%
HSLhsl(230.6, 62.6%, 58%)
HSV / HSBhsv(230.6, 62.3%, 84.3%)
CMYK62.3%, 52.6%, 0%, 15.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,334,743
CSS custom property--colour: #5166D7;

Brightness & contrast

Relative luminance0.16158WCAG 2.x, 0 is black and 1 is white
Perceived brightness115.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.96:1
Contrast with white4.96:1WCAG normal text: AA
Contrast with black4.23:1WCAG normal text: Fail
Greyscale equivalent#6A6A6A
Inverted#AE9928

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1E76DBno red cones; affects about 1% of men; ΔE 15.2 from the original
Deuteranopia#006AD5no green cones; the most common form, about 1% of men; ΔE 10.9 from the original
Tritanopia#008095no blue cones; rare, and affects men and women equally; ΔE 63.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.96:1WCAG large text: AAA
Contrast with black, large text4.23:1WCAG large text: AA

Named colours

Royal blue · ΔE 4.8Slate blue · ΔE 9.6Medium slateblue · ΔE 15.6Medium purple · ΔE 16.3Dodgerblue · ΔE 21.2Dark slateblue · ΔE 24.7
Nearest named CSS colourRoyal blue (#4169E1)ΔE 4.77, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D7C251
Analogous#51A9D7, #7F51D7
Triadic#D75166, #66D751
Split complementary#D77F51, #A9D751
Tetradic#D751A9, #D7C251, #51D77F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F7F8FD
Lighter +30%#CDD3F4
Lighter +20%#A4AFEA
Lighter +10%#7A8AE1
Darker −10%#2E46C7
Darker −20%#24379E
Darker −30%#1B2974
Darker −40%#111A4B
More saturated +25%#3654F2
Less saturated −25%#6C78BC

Channel breakdown

R81
G102
B215
Red81 (31.8%)
Green102 (40%)
Blue215 (84.3%)
Hue230.6°
Saturation (HSL)62.62%
Lightness58.04%
Dominant channelBlue
Hex per channelR 51 · G 66 · B D7

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Every value on this page was computed from “5166d7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.