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Recognised as Colour

#3171FF

  • #3171FF
  • Blue
  • Dark
  • Nearest: Royal blue

#3171FF is a blue with RGB values 49, 113, 255 and HSL 221°, 100%, 60%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#3171FF#3171FF
HEX#3171FF
RGBrgb(49, 113, 255)
RGB (0–1)0.1922, 0.4431, 1
RGB percentages19.2%, 44.3%, 100%
HSLhsl(221.4, 100%, 59.6%)
HSV / HSBhsv(221.4, 80.8%, 100%)
CMYK80.8%, 55.7%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,240,447
CSS custom property--colour: #3171FF;

Brightness & contrast

Relative luminance0.19683WCAG 2.x, 0 is black and 1 is white
Perceived brightness125 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.94:1
Contrast with white4.25:1WCAG normal text: Fail
Contrast with black4.94:1WCAG normal text: AA
Greyscale equivalent#6E6E6E
Inverted#CE8E00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0084FFno red cones; affects about 1% of men; ΔE 16.4 from the original
Deuteranopia#0072FCno green cones; the most common form, about 1% of men; ΔE 4.1 from the original
Tritanopia#0095ADno blue cones; rare, and affects men and women equally; ΔE 77.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.25:1WCAG large text: AA
Contrast with black, large text4.94:1WCAG large text: AAA

Named colours

Royal blue · ΔE 12.2Medium slateblue · ΔE 15.1Slate blue · ΔE 20.2Dodgerblue · ΔE 25.4Medium purple · ΔE 27Cornflower blue · ΔE 35.7
Nearest named CSS colourRoyal blue (#4169E1)ΔE 12.21, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFBF31
Analogous#31D8FF, #5831FF
Triadic#FF3171, #71FF31
Split complementary#FF5831, #D8FF31
Tetradic#FF31D8, #FFBF31, #31FF58

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FDFEFF
Lighter +30%#CADAFF
Lighter +20%#97B7FF
Lighter +10%#6494FF
Darker −10%#004FFD
Darker −20%#003FCA
Darker −30%#002F97
Darker −40%#001F64
More saturated +25%#3171FF
Less saturated −25%#4B7BE5

Channel breakdown

R49
G113
B255
Red49 (19.2%)
Green113 (44.3%)
Blue255 (100%)
Hue221.36°
Saturation (HSL)100%
Lightness59.61%
Dominant channelBlue
Hex per channelR 31 · G 71 · B FF

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Every value on this page was computed from “3171ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.