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Recognised as Colour

#311D84

  • #311D84
  • Blue
  • Dark
  • Nearest: Midnight blue

#311D84 is a blue with RGB values 49, 29, 132 and HSL 252°, 64%, 32%. It is a dark colour, so white text on it reaches 12.8:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#311D84#311D84
HEX#311D84
RGBrgb(49, 29, 132)
RGB (0–1)0.1922, 0.1137, 0.5176
RGB percentages19.2%, 11.4%, 51.8%
HSLhsl(251.7, 64%, 31.6%)
HSV / HSBhsv(251.7, 78%, 51.8%)
CMYK62.9%, 78%, 0%, 48.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,218,820
CSS custom property--colour: #311D84;

Brightness & contrast

Relative luminance0.03198WCAG 2.x, 0 is black and 1 is white
Perceived brightness56.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.81:1
Contrast with white12.81:1WCAG normal text: AAA
Contrast with black1.64:1WCAG normal text: Fail
Greyscale equivalent#292929
Inverted#CEE27B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003587no red cones; affects about 1% of men; ΔE 19.8 from the original
Deuteranopia#002E82no green cones; the most common form, about 1% of men; ΔE 16.5 from the original
Tritanopia#003B4Fno blue cones; rare, and affects men and women equally; ΔE 60.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.81:1WCAG large text: AAA
Contrast with black, large text1.64:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 9.9Indigo · ΔE 12.8Rebecca purple · ΔE 14.5Navy · ΔE 15.7Dark blue · ΔE 19.5Dark slateblue · ΔE 20.3
Nearest named CSS colourMidnight blue (#191970)ΔE 9.87, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#70841D
Analogous#1D3D84, #651D84
Triadic#84311D, #1D8431
Split complementary#84641D, #3D841D
Tetradic#841D3D, #70841D, #1D8464

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9A88E5
Lighter +30%#775EDC
Lighter +20%#5334D3
Lighter +10%#4126AE
Darker −10%#21145A
Darker −20%#120B30
Darker −30%#020107
Darker −40%#000000
More saturated +25%#250998
Less saturated −25%#3D3170

Channel breakdown

R49
G29
B132
Red49 (19.2%)
Green29 (11.4%)
Blue132 (51.8%)
Hue251.65°
Saturation (HSL)63.98%
Lightness31.57%
Dominant channelBlue
Hex per channelR 31 · G 1D · B 84

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Every value on this page was computed from “311d84” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.