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Colour

#313D78

  • #313D78
  • Blue
  • Dark
  • Nearest: Dark slateblue

#313D78 is a blue with RGB values 49, 61, 120 and HSL 230°, 42%, 33%. It is a dark colour, so white text on it reaches 10.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#313D78#313D78
HEX#313D78
RGBrgb(49, 61, 120)
RGB (0–1)0.1922, 0.2392, 0.4706
RGB percentages19.2%, 23.9%, 47.1%
HSLhsl(229.9, 42%, 33.1%)
HSV / HSBhsv(229.9, 59.2%, 47.1%)
CMYK59.2%, 49.2%, 0%, 52.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,227,000
CSS custom property--colour: #313D78;

Brightness & contrast

Relative luminance0.05347WCAG 2.x, 0 is black and 1 is white
Perceived brightness67.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.15:1
Contrast with white10.15:1WCAG normal text: AAA
Contrast with black2.07:1WCAG normal text: Fail
Greyscale equivalent#3F3F3F
Inverted#CEC287

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#21457Ano red cones; affects about 1% of men; ΔE 8.1 from the original
Deuteranopia#173E77no green cones; the most common form, about 1% of men; ΔE 5.9 from the original
Tritanopia#054A54no blue cones; rare, and affects men and women equally; ΔE 38.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.15:1WCAG large text: AAA
Contrast with black, large text2.07:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.9Midnight blue · ΔE 25.4Steel blue · ΔE 31Rebecca purple · ΔE 31.4Slate blue · ΔE 35.9Cornflower blue · ΔE 37.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.93, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#786C31
Analogous#316078, #493178
Triadic#78313D, #3D7831
Split complementary#784931, #607831
Tetradic#783160, #786C31, #317849

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9EA7D7
Lighter +30%#7A87C8
Lighter +20%#5566BA
Lighter +10%#404F9C
Darker −10%#222B54
Darker −20%#131830
Darker −30%#05060B
Darker −40%#000000
More saturated +25%#1C2F8D
Less saturated −25%#464B63

Channel breakdown

R49
G61
B120
Red49 (19.2%)
Green61 (23.9%)
Blue120 (47.1%)
Hue229.86°
Saturation (HSL)42.01%
Lightness33.14%
Dominant channelBlue
Hex per channelR 31 · G 3D · B 78

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Every value on this page was computed from “313d78” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.