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Recognised as Colour

#5187D3

  • #5187D3
  • Blue
  • Dark
  • Nearest: Cornflower blue

#5187D3 is a blue with RGB values 81, 135, 211 and HSL 215°, 60%, 57%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#5187D3#5187D3
HEX#5187D3
RGBrgb(81, 135, 211)
RGB (0–1)0.3176, 0.5294, 0.8275
RGB percentages31.8%, 52.9%, 82.7%
HSLhsl(215.1, 59.6%, 57.3%)
HSV / HSBhsv(215.1, 61.6%, 82.7%)
CMYK61.6%, 36%, 0%, 17.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,343,187
CSS custom property--colour: #5187D3;

Brightness & contrast

Relative luminance0.2378WCAG 2.x, 0 is black and 1 is white
Perceived brightness133.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.76:1
Contrast with white3.65:1WCAG normal text: Fail
Contrast with black5.76:1WCAG normal text: AA
Greyscale equivalent#818181
Inverted#AE782C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#668DD6no red cones; affects about 1% of men; ΔE 4.4 from the original
Deuteranopia#5580D1no green cones; the most common form, about 1% of men; ΔE 5 from the original
Tritanopia#0098A3no blue cones; rare, and affects men and women equally; ΔE 45.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.65:1WCAG large text: AA
Contrast with black, large text5.76:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 8.7Steel blue · ΔE 15.9Dodgerblue · ΔE 19.8Deep skyblue · ΔE 28.6Royal blue · ΔE 30.5Medium purple · ΔE 31.9
Nearest named CSS colourCornflower blue (#6495ED)ΔE 8.68, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D39D51
Analogous#51C8D3, #5C51D3
Triadic#D35187, #87D351
Split complementary#D35C51, #C8D351
Tetradic#D351C8, #D39D51, #51D35C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F4F7FC
Lighter +30%#CBDBF2
Lighter +20%#A2BFE8
Lighter +10%#7AA3DD
Darker −10%#316CC0
Darker −20%#265598
Darker −30%#1C3E6F
Darker −40%#122846
More saturated +25%#3682EE
Less saturated −25%#6C8CB8

Channel breakdown

R81
G135
B211
Red81 (31.8%)
Green135 (52.9%)
Blue211 (82.7%)
Hue215.08°
Saturation (HSL)59.63%
Lightness57.25%
Dominant channelBlue
Hex per channelR 51 · G 87 · B D3

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Every value on this page was computed from “5187d3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.