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Colour

#313D58

  • #313D58
  • Blue
  • Dark
  • Nearest: Dark slate grey

#313D58 is a blue with RGB values 49, 61, 88 and HSL 222°, 28%, 27%. It is a dark colour, so white text on it reaches 10.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#313D58#313D58
HEX#313D58
RGBrgb(49, 61, 88)
RGB (0–1)0.1922, 0.2392, 0.3451
RGB percentages19.2%, 23.9%, 34.5%
HSLhsl(221.5, 28.5%, 26.9%)
HSV / HSBhsv(221.5, 44.3%, 34.5%)
CMYK44.3%, 30.7%, 0%, 65.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,226,968
CSS custom property--colour: #313D58;

Brightness & contrast

Relative luminance0.04695WCAG 2.x, 0 is black and 1 is white
Perceived brightness61.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.83:1
Contrast with white10.83:1WCAG normal text: AAA
Contrast with black1.94:1WCAG normal text: Fail
Greyscale equivalent#3C3C3C
Inverted#CEC2A7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#343F59no red cones; affects about 1% of men; ΔE 1.2 from the original
Deuteranopia#303C57no green cones; the most common form, about 1% of men; ΔE 0.4 from the original
Tritanopia#244346no blue cones; rare, and affects men and women equally; ΔE 18.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.83:1WCAG large text: AAA
Contrast with black, large text1.94:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 21.1Dim grey · ΔE 25.9Slate grey · ΔE 28.4Steel blue · ΔE 31.1Light slate grey · ΔE 31.3Black · ΔE 31.5
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 21.11, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#584C31
Analogous#315058, #393158
Triadic#58313D, #3D5831
Split complementary#583931, #505831
Tetradic#583150, #584C31, #315839

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#92A1C3
Lighter +30%#7285B0
Lighter +20%#556A9A
Lighter +10%#435479
Darker −10%#1F2637
Darker −20%#0D1016
Darker −30%#000000
Darker −40%#000000
More saturated +25%#203669
Less saturated −25%#424447

Channel breakdown

R49
G61
B88
Red49 (19.2%)
Green61 (23.9%)
Blue88 (34.5%)
Hue221.54°
Saturation (HSL)28.47%
Lightness26.86%
Dominant channelBlue
Hex per channelR 31 · G 3D · B 58

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Every value on this page was computed from “313d58” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.