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Recognised as Colour

#312F58

  • #312F58
  • Blue
  • Dark
  • Nearest: Dark slateblue

#312F58 is a blue with RGB values 49, 47, 88 and HSL 243°, 30%, 26%. It is a dark colour, so white text on it reaches 12.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#312F58#312F58
HEX#312F58
RGBrgb(49, 47, 88)
RGB (0–1)0.1922, 0.1843, 0.3451
RGB percentages19.2%, 18.4%, 34.5%
HSLhsl(242.9, 30.4%, 26.5%)
HSV / HSBhsv(242.9, 46.6%, 34.5%)
CMYK44.3%, 46.6%, 0%, 65.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,223,384
CSS custom property--colour: #312F58;

Brightness & contrast

Relative luminance0.03391WCAG 2.x, 0 is black and 1 is white
Perceived brightness53.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.51:1
Contrast with white12.51:1WCAG normal text: AAA
Contrast with black1.68:1WCAG normal text: Fail
Greyscale equivalent#323232
Inverted#CED0A7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#20355Ano red cones; affects about 1% of men; ΔE 8.1 from the original
Deuteranopia#1F3257no green cones; the most common form, about 1% of men; ΔE 7.3 from the original
Tritanopia#25373Fno blue cones; rare, and affects men and women equally; ΔE 24.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.51:1WCAG large text: AAA
Contrast with black, large text1.68:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 23.9Midnight blue · ΔE 32Dark slate grey · ΔE 33.5Black · ΔE 35Dim grey · ΔE 35.9Steel blue · ΔE 36
Nearest named CSS colourDark slateblue (#483D8B)ΔE 23.93, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#56582F
Analogous#2F4158, #462F58
Triadic#58312F, #2F5831
Split complementary#58462F, #42582F
Tetradic#582F41, #56582F, #2F5846

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9290C3
Lighter +30%#726EB2
Lighter +20%#56539A
Lighter +10%#444179
Darker −10%#1E1D37
Darker −20%#0C0B16
Darker −30%#000000
Darker −40%#000000
More saturated +25%#221E69
Less saturated −25%#404047

Channel breakdown

R49
G47
B88
Red49 (19.2%)
Green47 (18.4%)
Blue88 (34.5%)
Hue242.93°
Saturation (HSL)30.37%
Lightness26.47%
Dominant channelBlue
Hex per channelR 31 · G 2F · B 58

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Every value on this page was computed from “312f58” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.