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Colour

#003399

  • #003399
  • Blue
  • Dark
  • Nearest: Midnight blue

#003399 is a blue with RGB values 0, 51, 153 and HSL 220°, 100%, 30%. It is a dark colour, so white text on it reaches 10.9:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#003399#003399
HEX#003399
HEX (short)#039
RGBrgb(0, 51, 153)
RGB (0–1)0, 0.2, 0.6
RGB percentages0%, 20%, 60%
HSLhsl(220, 100%, 30%)
HSV / HSBhsv(220, 100%, 60%)
CMYK100%, 66.7%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,209
CSS custom property--colour: #003399;

Brightness & contrast

Relative luminance0.04668WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.86:1
Contrast with white10.86:1WCAG normal text: AAA
Contrast with black1.93:1WCAG normal text: Fail
Greyscale equivalent#303030
Inverted#FFCC66

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00449Cno red cones; affects about 1% of men; ΔE 13.2 from the original
Deuteranopia#003697no green cones; the most common form, about 1% of men; ΔE 3.7 from the original
Tritanopia#004F61no blue cones; rare, and affects men and women equally; ΔE 60.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.86:1WCAG large text: AAA
Contrast with black, large text1.93:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 14Dark slateblue · ΔE 18Rebecca purple · ΔE 19.7Slate blue · ΔE 20.9Royal blue · ΔE 23.1Navy · ΔE 23.3
Nearest named CSS colourMidnight blue (#191970)ΔE 14.03, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#996600
Analogous#008099, #1A0099
Triadic#990033, #339900
Split complementary#991900, #7F9900
Tetradic#99007F, #996600, #009919

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6699FF
Lighter +30%#3377FF
Lighter +20%#0055FF
Lighter +10%#0044CC
Darker −10%#002266
Darker −20%#001133
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003399
Less saturated −25%#133986

Channel breakdown

R0
G51
B153
Red0 (0%)
Green51 (20%)
Blue153 (60%)
Hue220°
Saturation (HSL)100%
Lightness30%
Dominant channelBlue
Hex per channelR 00 · G 33 · B 99

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Every value on this page was computed from “hex 003399” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.