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Colour

#3183FF

  • #3183FF
  • Blue
  • Dark
  • Nearest: Dodgerblue

#3183FF is a blue with RGB values 49, 131, 255 and HSL 216°, 100%, 60%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#3183FF#3183FF
HEX#3183FF
RGBrgb(49, 131, 255)
RGB (0–1)0.1922, 0.5137, 1
RGB percentages19.2%, 51.4%, 100%
HSLhsl(216.1, 100%, 59.6%)
HSV / HSBhsv(216.1, 80.8%, 100%)
CMYK80.8%, 48.6%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,245,055
CSS custom property--colour: #3183FF;

Brightness & contrast

Relative luminance0.24106WCAG 2.x, 0 is black and 1 is white
Perceived brightness134.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.82:1
Contrast with white3.61:1WCAG normal text: Fail
Contrast with black5.82:1WCAG normal text: AA
Greyscale equivalent#7B7B7B
Inverted#CE7C00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3791FFno red cones; affects about 1% of men; ΔE 10.9 from the original
Deuteranopia#007EFDno green cones; the most common form, about 1% of men; ΔE 3.2 from the original
Tritanopia#00A1B5no blue cones; rare, and affects men and women equally; ΔE 67.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.61:1WCAG large text: AA
Contrast with black, large text5.82:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 11.1Royal blue · ΔE 11.4Cornflower blue · ΔE 22.4Medium slateblue · ΔE 22.4Slate blue · ΔE 22.7Medium purple · ΔE 25.5
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 11.07, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFAD31
Analogous#31EAFF, #4631FF
Triadic#FF3183, #83FF31
Split complementary#FF4631, #EAFF31
Tetradic#FF31EA, #FFAD31, #31FF46

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FDFEFF
Lighter +30%#CADFFF
Lighter +20%#97C0FF
Lighter +10%#64A2FF
Darker −10%#0065FD
Darker −20%#0050CA
Darker −30%#003C97
Darker −40%#002864
More saturated +25%#3183FF
Less saturated −25%#4B88E5

Channel breakdown

R49
G131
B255
Red49 (19.2%)
Green131 (51.4%)
Blue255 (100%)
Hue216.12°
Saturation (HSL)100%
Lightness59.61%
Dominant channelBlue
Hex per channelR 31 · G 83 · B FF

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Every value on this page was computed from “3183ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.