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Recognised as Colour

#312F9B

  • #312F9B
  • Blue
  • Dark
  • Nearest: Rebecca purple

#312F9B is a blue with RGB values 49, 47, 155 and HSL 241°, 53%, 40%. It is a dark colour, so white text on it reaches 10.4:1 contrast (AAA for normal text). The nearest named colour is Rebecca purple.

Colour values

#312F9B#312F9B
HEX#312F9B
RGBrgb(49, 47, 155)
RGB (0–1)0.1922, 0.1843, 0.6078
RGB percentages19.2%, 18.4%, 60.8%
HSLhsl(241.1, 53.5%, 39.6%)
HSV / HSBhsv(241.1, 69.7%, 60.8%)
CMYK68.4%, 69.7%, 0%, 39.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,223,451
CSS custom property--colour: #312F9B;

Brightness & contrast

Relative luminance0.05053WCAG 2.x, 0 is black and 1 is white
Perceived brightness68.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.45:1
Contrast with white10.45:1WCAG normal text: AAA
Contrast with black2.01:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#CED064

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00449Eno red cones; affects about 1% of men; ΔE 18 from the original
Deuteranopia#003B99no green cones; the most common form, about 1% of men; ΔE 13.1 from the original
Tritanopia#004C61no blue cones; rare, and affects men and women equally; ΔE 62.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.45:1WCAG large text: AAA
Contrast with black, large text2.01:1WCAG large text: Fail

Named colours

Rebecca purple · ΔE 14.5Midnight blue · ΔE 14.8Indigo · ΔE 17.6Slate blue · ΔE 18.5Navy · ΔE 19.1Dark slateblue · ΔE 19.6
Nearest named CSS colourRebecca purple (#663399)ΔE 14.47, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#999B2F
Analogous#2F639B, #672F9B
Triadic#9B312F, #2F9B31
Split complementary#9B672F, #639B2F
Tetradic#9B2F63, #999B2F, #2F9B67

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B0AFE7
Lighter +30%#8A88DB
Lighter +20%#6361CF
Lighter +10%#3D3BC2
Darker −10%#252374
Darker −20%#18174D
Darker −30%#0C0B26
Darker −40%#000000
More saturated +25%#1916B4
Less saturated −25%#494882

Channel breakdown

R49
G47
B155
Red49 (19.2%)
Green47 (18.4%)
Blue155 (60.8%)
Hue241.11°
Saturation (HSL)53.47%
Lightness39.61%
Dominant channelBlue
Hex per channelR 31 · G 2F · B 9B

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Every value on this page was computed from “312f9b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.