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Recognised as Colour

#517BC7

  • #517BC7
  • Blue
  • Dark
  • Nearest: Cornflower blue

#517BC7 is a blue with RGB values 81, 123, 199 and HSL 219°, 51%, 55%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#517BC7#517BC7
HEX#517BC7
RGBrgb(81, 123, 199)
RGB (0–1)0.3176, 0.4824, 0.7804
RGB percentages31.8%, 48.2%, 78%
HSLhsl(218.6, 51.3%, 54.9%)
HSV / HSBhsv(218.6, 59.3%, 78%)
CMYK59.3%, 38.2%, 0%, 22%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,340,103
CSS custom property--colour: #517BC7;

Brightness & contrast

Relative luminance0.20039WCAG 2.x, 0 is black and 1 is white
Perceived brightness123.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.01:1
Contrast with white4.19:1WCAG normal text: Fail
Contrast with black5.01:1WCAG normal text: AA
Greyscale equivalent#787878
Inverted#AE8438

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5B82CAno red cones; affects about 1% of men; ΔE 3.8 from the original
Deuteranopia#4B77C5no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#008C97no blue cones; rare, and affects men and women equally; ΔE 46.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.19:1WCAG large text: AA
Contrast with black, large text5.01:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 11.4Steel blue · ΔE 17.3Dodgerblue · ΔE 20.9Dark slateblue · ΔE 27.4Royal blue · ΔE 27.9Medium purple · ΔE 29
Nearest named CSS colourCornflower blue (#6495ED)ΔE 11.4, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C79D51
Analogous#51B6C7, #6251C7
Triadic#C7517B, #7BC751
Split complementary#C76251, #B6C751
Tetradic#C751B6, #C79D51, #51C762

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EBF0F9
Lighter +30%#C5D3EC
Lighter +20%#9EB6E0
Lighter +10%#7898D3
Darker −10%#3862AD
Darker −20%#2B4C87
Darker −30%#1F3660
Darker −40%#132039
More saturated +25%#3473E4
Less saturated −25%#6E83AA

Channel breakdown

R81
G123
B199
Red81 (31.8%)
Green123 (48.2%)
Blue199 (78%)
Hue218.64°
Saturation (HSL)51.3%
Lightness54.9%
Dominant channelBlue
Hex per channelR 51 · G 7B · B C7

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Every value on this page was computed from “517bc7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.