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Recognised as Colour

#517AE8

  • #517AE8
  • Blue
  • Dark
  • Nearest: Royal blue

#517AE8 is a blue with RGB values 81, 122, 232 and HSL 224°, 77%, 61%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#517AE8#517AE8
HEX#517AE8
RGBrgb(81, 122, 232)
RGB (0–1)0.3176, 0.4784, 0.9098
RGB percentages31.8%, 47.8%, 91%
HSLhsl(223.7, 76.6%, 61.4%)
HSV / HSBhsv(223.7, 65.1%, 91%)
CMYK65.1%, 47.4%, 0%, 9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,339,880
CSS custom property--colour: #517AE8;

Brightness & contrast

Relative luminance0.21495WCAG 2.x, 0 is black and 1 is white
Perceived brightness129.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.3:1
Contrast with white3.96:1WCAG normal text: Fail
Contrast with black5.3:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#AE8517

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4187ECno red cones; affects about 1% of men; ΔE 9.8 from the original
Deuteranopia#1F79E6no green cones; the most common form, about 1% of men; ΔE 6.5 from the original
Tritanopia#0093A6no blue cones; rare, and affects men and women equally; ΔE 61.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.96:1WCAG large text: AA
Contrast with black, large text5.3:1WCAG large text: AAA

Named colours

Royal blue · ΔE 9.6Dodgerblue · ΔE 12.5Cornflower blue · ΔE 17.6Slate blue · ΔE 17.7Medium purple · ΔE 19.2Medium slateblue · ΔE 21.3
Nearest named CSS colourRoyal blue (#4169E1)ΔE 9.62, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E8BF51
Analogous#51C5E8, #7351E8
Triadic#E8517A, #7AE851
Split complementary#E87451, #C5E851
Tetradic#E851C6, #E8BF51, #51E874

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D8E1FA
Lighter +20%#ABBFF4
Lighter +10%#7E9CEE
Darker −10%#2458E2
Darker −20%#1945BA
Darker −30%#13348D
Darker −40%#0D2360
More saturated +25%#3A6FFF
Less saturated −25%#6A85CF

Channel breakdown

R81
G122
B232
Red81 (31.8%)
Green122 (47.8%)
Blue232 (91%)
Hue223.71°
Saturation (HSL)76.65%
Lightness61.37%
Dominant channelBlue
Hex per channelR 51 · G 7A · B E8

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Every value on this page was computed from “517ae8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.