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Recognised as Colour

#517ECF

  • #517ECF
  • Blue
  • Dark
  • Nearest: Cornflower blue

#517ECF is a blue with RGB values 81, 126, 207 and HSL 219°, 57%, 56%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#517ECF#517ECF
HEX#517ECF
RGBrgb(81, 126, 207)
RGB (0–1)0.3176, 0.4941, 0.8118
RGB percentages31.8%, 49.4%, 81.2%
HSLhsl(218.6, 56.8%, 56.5%)
HSV / HSBhsv(218.6, 60.9%, 81.2%)
CMYK60.9%, 39.1%, 0%, 18.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,340,879
CSS custom property--colour: #517ECF;

Brightness & contrast

Relative luminance0.21176WCAG 2.x, 0 is black and 1 is white
Perceived brightness127.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.24:1
Contrast with white4.01:1WCAG normal text: Fail
Contrast with black5.24:1WCAG normal text: AA
Greyscale equivalent#7A7A7A
Inverted#AE8130

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5B85D2no red cones; affects about 1% of men; ΔE 3.8 from the original
Deuteranopia#497ACDno green cones; the most common form, about 1% of men; ΔE 2.2 from the original
Tritanopia#00909Cno blue cones; rare, and affects men and women equally; ΔE 48.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.01:1WCAG large text: AA
Contrast with black, large text5.24:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 9.2Dodgerblue · ΔE 18Steel blue · ΔE 19.7Royal blue · ΔE 25.7Medium purple · ΔE 27.6Dark slateblue · ΔE 28.1
Nearest named CSS colourCornflower blue (#6495ED)ΔE 9.22, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CFA251
Analogous#51BDCF, #6351CF
Triadic#CF517E, #7ECF51
Split complementary#CF6351, #BDCF51
Tetradic#CF51BD, #CFA251, #51CF63

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F1F5FB
Lighter +30%#C9D7F0
Lighter +20%#A1B9E5
Lighter +10%#799CDA
Darker −10%#3363BA
Darker −20%#284E92
Darker −30%#1D396A
Darker −40%#122342
More saturated +25%#3576EB
Less saturated −25%#6D86B3

Channel breakdown

R81
G126
B207
Red81 (31.8%)
Green126 (49.4%)
Blue207 (81.2%)
Hue218.57°
Saturation (HSL)56.76%
Lightness56.47%
Dominant channelBlue
Hex per channelR 51 · G 7E · B CF

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