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Recognised as Colour

#03399D

  • #03399D
  • Blue
  • Dark
  • Nearest: Midnight blue

#03399D is a blue with RGB values 3, 57, 157 and HSL 219°, 96%, 31%. It is a dark colour, so white text on it reaches 10.1:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#03399D#03399D
HEX#03399D
RGBrgb(3, 57, 157)
RGB (0–1)0.0118, 0.2235, 0.6157
RGB percentages1.2%, 22.4%, 61.6%
HSLhsl(219, 96.3%, 31.4%)
HSV / HSBhsv(219, 98.1%, 61.6%)
CMYK98.1%, 63.7%, 0%, 38.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer211,357
CSS custom property--colour: #03399D;

Brightness & contrast

Relative luminance0.0538WCAG 2.x, 0 is black and 1 is white
Perceived brightness68.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.12:1
Contrast with white10.12:1WCAG normal text: AAA
Contrast with black2.08:1WCAG normal text: Fail
Greyscale equivalent#353535
Inverted#FCC662

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0049A0no red cones; affects about 1% of men; ΔE 12.5 from the original
Deuteranopia#003B9Bno green cones; the most common form, about 1% of men; ΔE 2.9 from the original
Tritanopia#005465no blue cones; rare, and affects men and women equally; ΔE 59.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.12:1WCAG large text: AAA
Contrast with black, large text2.08:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 15.6Dark slateblue · ΔE 16.4Slate blue · ΔE 20Rebecca purple · ΔE 20.4Royal blue · ΔE 21.2Navy · ΔE 26.5
Nearest named CSS colourMidnight blue (#191970)ΔE 15.61, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9D6703
Analogous#03869D, #1A039D
Triadic#9D0339, #399D03
Split complementary#9D1A03, #869D03
Tetradic#9D0386, #9D6703, #039D1A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#70A1FC
Lighter +30%#3E80FB
Lighter +20%#0C5FFA
Lighter +10%#044BCF
Darker −10%#02276B
Darker −20%#011539
Darker −30%#000207
Darker −40%#000000
More saturated +25%#0038A0
Less saturated −25%#173F89

Channel breakdown

R3
G57
B157
Red3 (1.2%)
Green57 (22.4%)
Blue157 (61.6%)
Hue218.96°
Saturation (HSL)96.25%
Lightness31.37%
Dominant channelBlue
Hex per channelR 03 · G 39 · B 9D

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Every value on this page was computed from “03399d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.