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Recognised as Colour

#313F65

  • #313F65
  • Blue
  • Dark
  • Nearest: Dark slateblue

#313F65 is a blue with RGB values 49, 63, 101 and HSL 224°, 35%, 29%. It is a dark colour, so white text on it reaches 10.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#313F65#313F65
HEX#313F65
RGBrgb(49, 63, 101)
RGB (0–1)0.1922, 0.2471, 0.3961
RGB percentages19.2%, 24.7%, 39.6%
HSLhsl(223.8, 34.7%, 29.4%)
HSV / HSBhsv(223.8, 51.5%, 39.6%)
CMYK51.5%, 37.6%, 0%, 60.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,227,493
CSS custom property--colour: #313F65;

Brightness & contrast

Relative luminance0.05148WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.35:1
Contrast with white10.35:1WCAG normal text: AAA
Contrast with black2.03:1WCAG normal text: Fail
Greyscale equivalent#3F3F3F
Inverted#CEC09A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#314367no red cones; affects about 1% of men; ΔE 2.6 from the original
Deuteranopia#2B3E64no green cones; the most common form, about 1% of men; ΔE 1.6 from the original
Tritanopia#1C474Dno blue cones; rare, and affects men and women equally; ΔE 24.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.35:1WCAG large text: AAA
Contrast with black, large text2.03:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 27.1Dark slate grey · ΔE 27.4Steel blue · ΔE 28.5Slate grey · ΔE 30.2Dim grey · ΔE 30.3Light slate grey · ΔE 32.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 27.06, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#655731
Analogous#315965, #3D3165
Triadic#65313F, #3F6531
Split complementary#653D31, #596531
Tetradic#653159, #655731, #31653D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#96A5CC
Lighter +30%#7487BB
Lighter +20%#526AAA
Lighter +10%#425487
Darker −10%#202A43
Darker −20%#101420
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1E3678
Less saturated −25%#444852

Channel breakdown

R49
G63
B101
Red49 (19.2%)
Green63 (24.7%)
Blue101 (39.6%)
Hue223.85°
Saturation (HSL)34.67%
Lightness29.41%
Dominant channelBlue
Hex per channelR 31 · G 3F · B 65

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Every value on this page was computed from “313f65” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.