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Recognised as Colour

#331B39

  • #331B39
  • Violet
  • Dark
  • Nearest: Black

#331B39 is a violet with RGB values 51, 27, 57 and HSL 288°, 36%, 16%. It is a dark colour, so white text on it reaches 15.5:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#331B39#331B39
HEX#331B39
RGBrgb(51, 27, 57)
RGB (0–1)0.2, 0.1059, 0.2235
RGB percentages20%, 10.6%, 22.4%
HSLhsl(288, 35.7%, 16.5%)
HSV / HSBhsv(288, 52.6%, 22.4%)
CMYK10.5%, 52.6%, 0%, 77.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,349,305
CSS custom property--colour: #331B39;

Brightness & contrast

Relative luminance0.01783WCAG 2.x, 0 is black and 1 is white
Perceived brightness39.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.48:1
Contrast with white15.48:1WCAG normal text: AAA
Contrast with black1.36:1WCAG normal text: Fail
Greyscale equivalent#222222
Inverted#CCE4C6

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#16233Ano red cones; affects about 1% of men; ΔE 15.5 from the original
Deuteranopia#1D2538no green cones; the most common form, about 1% of men; ΔE 15.5 from the original
Tritanopia#331F27no blue cones; rare, and affects men and women equally; ΔE 14.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.48:1WCAG large text: AAA
Contrast with black, large text1.36:1WCAG large text: Fail

Named colours

Black · ΔE 27.3Dark slateblue · ΔE 33Dark slate grey · ΔE 35.9Midnight blue · ΔE 37.5Dim grey · ΔE 38Slate grey · ΔE 43.7
Nearest named CSS colourBlack (#000000)ΔE 27.27, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#21391B
Analogous#241B39, #391B30
Triadic#39331B, #1B3933
Split complementary#30391B, #1B3924
Tetradic#39241B, #21391B, #1B3039

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A868B8
Lighter +30%#904CA1
Lighter +20%#713C7E
Lighter +10%#522B5C
Darker −10%#140B16
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#391043
Less saturated −25%#2D252F

Channel breakdown

R51
G27
B57
Red51 (20%)
Green27 (10.6%)
Blue57 (22.4%)
Hue288°
Saturation (HSL)35.71%
Lightness16.47%
Dominant channelBlue
Hex per channelR 33 · G 1B · B 39

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Every value on this page was computed from “331b39” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.