Colour

#31319B

#31319B
Blue
Dark
Nearest: Rebecca purple

#31319B is a blue with RGB values 49, 49, 155 and HSL 240°, 52%, 40%. It is a dark colour, so white text on it reaches 10.3:1 contrast (AAA for normal text). The nearest named colour is Rebecca purple.

Colour values

#31319B#31319B

HEX#31319B

RGBrgb(49, 49, 155)

RGB (0–1)0.1922, 0.1922, 0.6078

RGB percentages19.2%, 19.2%, 60.8%

HSLhsl(240, 52%, 40%)

HSV / HSBhsv(240, 68.4%, 60.8%)

CMYK68.4%, 68.4%, 0%, 39.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer3,223,963

CSS custom property--colour: #31319B;

Brightness & contrast

Relative luminance0.05216WCAG 2.x, 0 is black and 1 is white

Perceived brightness69.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 10.28:1

Contrast with white10.28:1WCAG normal text: AAA

Contrast with black2.04:1WCAG normal text: Fail

Greyscale equivalent#393939

Inverted#CECE64

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#00459Eno red cones; affects about 1% of men; ΔE 17.3 from the original

Deuteranopia#003C99no green cones; the most common form, about 1% of men; ΔE 12.5 from the original

Tritanopia#004D62no blue cones; rare, and affects men and women equally; ΔE 61.5 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text10.28:1WCAG large text: AAA

Contrast with black, large text2.04:1WCAG large text: Fail

Named colours

Rebecca purple · ΔE 14.4 Midnight blue · ΔE 14.4 Slate blue · ΔE 18 Dark slateblue · ΔE 18.2 Indigo · ΔE 18.7 Navy · ΔE 20.4

Nearest named CSS colourRebecca purple (#663399)ΔE 14.36, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#9B9B31

Analogous#31669B, #66319B

Triadic#9B3131, #319B31

Split complementary#9B6631, #669B31

Tetradic#9B3166, #9B9B31, #319B66

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#B2B2E7

Lighter +30%#8B8BDA

Lighter +20%#6464CE

Lighter +10%#3D3DC2

Darker −10%#252574

Darker −20%#18184E

Darker −30%#0C0C27

Darker −40%#000000

More saturated +25%#1818B5

Less saturated −25%#4A4A82

Channel breakdown

R49

G49

B155

Red49 (19.2%)

Green49 (19.2%)

Blue155 (60.8%)

Hue240°

Saturation (HSL)51.96%

Lightness40%

Dominant channelBlue

Hex per channelR 31 · G 31 · B 9B

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#31319B

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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