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Recognised as Colour

#303C71

  • #303C71
  • Blue
  • Dark
  • Nearest: Dark slateblue

#303C71 is a blue with RGB values 48, 60, 113 and HSL 229°, 40%, 32%. 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 slateblue.

Colour values

#303C71#303C71
HEX#303C71
RGBrgb(48, 60, 113)
RGB (0–1)0.1882, 0.2353, 0.4431
RGB percentages18.8%, 23.5%, 44.3%
HSLhsl(228.9, 40.4%, 31.6%)
HSV / HSBhsv(228.9, 57.5%, 44.3%)
CMYK57.5%, 46.9%, 0%, 55.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,161,201
CSS custom property--colour: #303C71;

Brightness & contrast

Relative luminance0.05052WCAG 2.x, 0 is black and 1 is white
Perceived brightness65.3 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#3D3D3D
Inverted#CFC38E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#254273no red cones; affects about 1% of men; ΔE 5.9 from the original
Deuteranopia#1D3D70no green cones; the most common form, about 1% of men; ΔE 5 from the original
Tritanopia#0D4851no blue cones; rare, and affects men and women equally; ΔE 34.4 from the original
Distinguishable without hueYesnever 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

Dark slateblue · ΔE 17.5Midnight blue · ΔE 28.4Steel blue · ΔE 30.3Rebecca purple · ΔE 34.7Slate grey · ΔE 36.7Dark slate grey · ΔE 37.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 17.47, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#716530
Analogous#305D71, #443071
Triadic#71303C, #3C7130
Split complementary#714430, #5D7130
Tetradic#71305D, #716530, #307144

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#99A4D4
Lighter +30%#7584C5
Lighter +20%#5264B5
Lighter +10%#3F4F95
Darker −10%#21294D
Darker −20%#121629
Darker −30%#020306
Darker −40%#000000
More saturated +25%#1C2F85
Less saturated −25%#44495D

Channel breakdown

R48
G60
B113
Red48 (18.8%)
Green60 (23.5%)
Blue113 (44.3%)
Hue228.92°
Saturation (HSL)40.37%
Lightness31.57%
Dominant channelBlue
Hex per channelR 30 · G 3C · B 71

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Every value on this page was computed from “303c71” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.