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Recognised as Colour

#2F3379

  • #2F3379
  • Blue
  • Dark
  • Nearest: Dark slateblue

#2F3379 is a blue with RGB values 47, 51, 121 and HSL 237°, 44%, 33%. It is a dark colour, so white text on it reaches 11.2:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#2F3379#2F3379
HEX#2F3379
RGBrgb(47, 51, 121)
RGB (0–1)0.1843, 0.2, 0.4745
RGB percentages18.4%, 20%, 47.5%
HSLhsl(236.8, 44%, 32.9%)
HSV / HSBhsv(236.8, 61.2%, 47.5%)
CMYK61.2%, 57.9%, 0%, 52.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,093,369
CSS custom property--colour: #2F3379;

Brightness & contrast

Relative luminance0.04352WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.23:1
Contrast with white11.23:1WCAG normal text: AAA
Contrast with black1.87:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#D0CC86

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003E7Bno red cones; affects about 1% of men; ΔE 12.9 from the original
Deuteranopia#003878no green cones; the most common form, about 1% of men; ΔE 9.8 from the original
Tritanopia#004350no blue cones; rare, and affects men and women equally; ΔE 44.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.23:1WCAG large text: AAA
Contrast with black, large text1.87:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 8Midnight blue · ΔE 16.5Rebecca purple · ΔE 24.2Slate blue · ΔE 30.6Indigo · ΔE 33.4Royal blue · ΔE 34.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 7.96, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#79752F
Analogous#2F5879, #502F79
Triadic#792F33, #33792F
Split complementary#79502F, #58792F
Tetradic#792F58, #79752F, #2F7950

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9C9FD8
Lighter +30%#777BCA
Lighter +20%#5258BC
Lighter +10%#3D429E
Darker −10%#212454
Darker −20%#121430
Darker −30%#04050B
Darker −40%#000000
More saturated +25%#1A208E
Less saturated −25%#444664

Channel breakdown

R47
G51
B121
Red47 (18.4%)
Green51 (20%)
Blue121 (47.5%)
Hue236.76°
Saturation (HSL)44.05%
Lightness32.94%
Dominant channelBlue
Hex per channelR 2F · G 33 · B 79

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Every value on this page was computed from “2f3379” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.