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Recognised as Colour

#313F83

  • #313F83
  • Blue
  • Dark
  • Nearest: Dark slateblue

#313F83 is a blue with RGB values 49, 63, 131 and HSL 230°, 46%, 35%. It is a dark colour, so white text on it reaches 9.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#313F83#313F83
HEX#313F83
RGBrgb(49, 63, 131)
RGB (0–1)0.1922, 0.2471, 0.5137
RGB percentages19.2%, 24.7%, 51.4%
HSLhsl(229.8, 45.6%, 35.3%)
HSV / HSBhsv(229.8, 62.6%, 51.4%)
CMYK62.6%, 51.9%, 0%, 48.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,227,523
CSS custom property--colour: #313F83;

Brightness & contrast

Relative luminance0.05847WCAG 2.x, 0 is black and 1 is white
Perceived brightness70.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.68:1
Contrast with white9.68:1WCAG normal text: AAA
Contrast with black2.17:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#CEC07C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1A4885no red cones; affects about 1% of men; ΔE 9.4 from the original
Deuteranopia#084182no green cones; the most common form, about 1% of men; ΔE 7.3 from the original
Tritanopia#004F5Bno blue cones; rare, and affects men and women equally; ΔE 42.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.68:1WCAG large text: AAA
Contrast with black, large text2.17:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 9.5Midnight blue · ΔE 21.9Rebecca purple · ΔE 27.2Slate blue · ΔE 30.7Steel blue · ΔE 32.5Royal blue · ΔE 32.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 9.52, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#837531
Analogous#316883, #4C3183
Triadic#83313F, #3F8331
Split complementary#834C31, #688331
Tetradic#833168, #837531, #31834C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A3ADDD
Lighter +30%#7E8CCF
Lighter +20%#596BC1
Lighter +10%#3F51A8
Darker −10%#232D5E
Darker −20%#151B39
Darker −30%#070914
Darker −40%#000000
More saturated +25%#1A309A
Less saturated −25%#474E6C

Channel breakdown

R49
G63
B131
Red49 (19.2%)
Green63 (24.7%)
Blue131 (51.4%)
Hue229.76°
Saturation (HSL)45.56%
Lightness35.29%
Dominant channelBlue
Hex per channelR 31 · G 3F · B 83

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Every value on this page was computed from “313f83” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.