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Colour

#517CCB

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

#517CCB is a blue with RGB values 81, 124, 203 and HSL 219°, 54%, 56%. It is a dark colour, so black text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#517CCB#517CCB
HEX#517CCB
RGBrgb(81, 124, 203)
RGB (0–1)0.3176, 0.4863, 0.7961
RGB percentages31.8%, 48.6%, 79.6%
HSLhsl(218.9, 54%, 55.7%)
HSV / HSBhsv(218.9, 60.1%, 79.6%)
CMYK60.1%, 38.9%, 0%, 20.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,340,363
CSS custom property--colour: #517CCB;

Brightness & contrast

Relative luminance0.20476WCAG 2.x, 0 is black and 1 is white
Perceived brightness125.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.1:1
Contrast with white4.12:1WCAG normal text: Fail
Contrast with black5.1:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#AE8334

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5A83CEno red cones; affects about 1% of men; ΔE 3.8 from the original
Deuteranopia#4A78C9no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#008E9Ano blue cones; rare, and affects men and women equally; ΔE 47.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.12:1WCAG large text: AA
Contrast with black, large text5.1:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 10.3Steel blue · ΔE 18.9Dodgerblue · ΔE 19.3Royal blue · ΔE 26.4Dark slateblue · ΔE 27.5Medium purple · ΔE 27.9
Nearest named CSS colourCornflower blue (#6495ED)ΔE 10.3, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CBA051
Analogous#51B9CB, #6351CB
Triadic#CB517C, #7CCB51
Split complementary#CB6351, #B9CB51
Tetradic#CB51B9, #CBA051, #51CB63

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EEF2FA
Lighter +30%#C7D5EE
Lighter +20%#A0B7E2
Lighter +10%#789AD7
Darker −10%#3662B3
Darker −20%#2A4D8C
Darker −30%#1E3765
Darker −40%#12223E
More saturated +25%#3574E7
Less saturated −25%#6D84AF

Channel breakdown

R81
G124
B203
Red81 (31.8%)
Green124 (48.6%)
Blue203 (79.6%)
Hue218.85°
Saturation (HSL)53.98%
Lightness55.69%
Dominant channelBlue
Hex per channelR 51 · G 7C · B CB

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