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Recognised as Colour

#331FB7

  • #331FB7
  • Blue
  • Dark
  • Nearest: Dark blue

#331FB7 is a blue with RGB values 51, 31, 183 and HSL 248°, 71%, 42%. It is a dark colour, so white text on it reaches 10.4:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#331FB7#331FB7
HEX#331FB7
RGBrgb(51, 31, 183)
RGB (0–1)0.2, 0.1216, 0.7176
RGB percentages20%, 12.2%, 71.8%
HSLhsl(247.9, 71%, 42%)
HSV / HSBhsv(247.9, 83.1%, 71.8%)
CMYK72.1%, 83.1%, 0%, 28.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,350,455
CSS custom property--colour: #331FB7;

Brightness & contrast

Relative luminance0.05103WCAG 2.x, 0 is black and 1 is white
Perceived brightness71.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.39:1
Contrast with white10.39:1WCAG normal text: AAA
Contrast with black2.02:1WCAG normal text: Fail
Greyscale equivalent#2E2E2E
Inverted#CCE048

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0046BBno red cones; affects about 1% of men; ΔE 26.6 from the original
Deuteranopia#0039B4no green cones; the most common form, about 1% of men; ΔE 19.5 from the original
Tritanopia#00506Dno blue cones; rare, and affects men and women equally; ΔE 82.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.39:1WCAG large text: AAA
Contrast with black, large text2.02:1WCAG large text: Fail

Named colours

Dark blue · ΔE 14.2Navy · ΔE 18.5Medium blue · ΔE 21.4Blue violet · ΔE 22.1Indigo · ΔE 22.8Dark orchid · ΔE 24.9
Nearest named CSS colourDark blue (#00008B)ΔE 14.21, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A3B71F
Analogous#1F57B7, #7F1FB7
Triadic#B7331F, #1FB733
Split complementary#B77F1F, #57B71F
Tetradic#B71F57, #A3B71F, #1FB77F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B9B0F2
Lighter +30%#9285EA
Lighter +20%#6B59E3
Lighter +10%#442DDC
Darker −10%#27188B
Darker −20%#1B1060
Darker −30%#0F0934
Darker −40%#020109
More saturated +25%#1F04D2
Less saturated −25%#473A9C

Channel breakdown

R51
G31
B183
Red51 (20%)
Green31 (12.2%)
Blue183 (71.8%)
Hue247.89°
Saturation (HSL)71.03%
Lightness41.96%
Dominant channelBlue
Hex per channelR 33 · G 1F · B B7

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Every value on this page was computed from “331fb7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.