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Recognised as Colour

#517BBF

  • #517BBF
  • Blue
  • Dark
  • Nearest: Steel blue

#517BBF is a blue with RGB values 81, 123, 191 and HSL 217°, 46%, 53%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#517BBF#517BBF
HEX#517BBF
RGBrgb(81, 123, 191)
RGB (0–1)0.3176, 0.4824, 0.749
RGB percentages31.8%, 48.2%, 74.9%
HSLhsl(217.1, 46.2%, 53.3%)
HSV / HSBhsv(217.1, 57.6%, 74.9%)
CMYK57.6%, 35.6%, 0%, 25.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,340,095
CSS custom property--colour: #517BBF;

Brightness & contrast

Relative luminance0.19677WCAG 2.x, 0 is black and 1 is white
Perceived brightness122.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.94:1
Contrast with white4.26:1WCAG normal text: Fail
Contrast with black4.94:1WCAG normal text: AA
Greyscale equivalent#777777
Inverted#AE8440

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5F80C2no red cones; affects about 1% of men; ΔE 3.2 from the original
Deuteranopia#5176BEno green cones; the most common form, about 1% of men; ΔE 3.5 from the original
Tritanopia#008A94no blue cones; rare, and affects men and women equally; ΔE 42 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.26:1WCAG large text: AA
Contrast with black, large text4.94:1WCAG large text: AAA

Named colours

Steel blue · ΔE 12.8Cornflower blue · ΔE 14.4Dodgerblue · ΔE 25Dark slateblue · ΔE 28.9Light slate grey · ΔE 30.4Slate grey · ΔE 30.6
Nearest named CSS colourSteel blue (#4682B4)ΔE 12.79, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BF9551
Analogous#51B2BF, #5E51BF
Triadic#BF517B, #7BBF51
Split complementary#BF5E51, #B2BF51
Tetradic#BF51B2, #BF9551, #51BF5E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E6ECF6
Lighter +30%#C1D0E8
Lighter +20%#9CB4DA
Lighter +10%#7697CD
Darker −10%#3B62A2
Darker −20%#2E4C7C
Darker −30%#203557
Darker −40%#121E32
More saturated +25%#3374DD
Less saturated −25%#6F82A1

Channel breakdown

R81
G123
B191
Red81 (31.8%)
Green123 (48.2%)
Blue191 (74.9%)
Hue217.09°
Saturation (HSL)46.22%
Lightness53.33%
Dominant channelBlue
Hex per channelR 51 · G 7B · B BF

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