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Colour

#003799

  • #003799
  • Blue
  • Dark
  • Nearest: Midnight blue

#003799 is a blue with RGB values 0, 55, 153 and HSL 218°, 100%, 30%. It is a dark colour, so white text on it reaches 10.5:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#003799#003799
HEX#003799
RGBrgb(0, 55, 153)
RGB (0–1)0, 0.2157, 0.6
RGB percentages0%, 21.6%, 60%
HSLhsl(218.4, 100%, 30%)
HSV / HSBhsv(218.4, 100%, 60%)
CMYK100%, 64.1%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer14,233
CSS custom property--colour: #003799;

Brightness & contrast

Relative luminance0.05032WCAG 2.x, 0 is black and 1 is white
Perceived brightness66.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.47:1
Contrast with white10.47:1WCAG normal text: AAA
Contrast with black2.01:1WCAG normal text: Fail
Greyscale equivalent#323232
Inverted#FFC866

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00469Cno red cones; affects about 1% of men; ΔE 11.6 from the original
Deuteranopia#003997no green cones; the most common form, about 1% of men; ΔE 2.9 from the original
Tritanopia#005162no blue cones; rare, and affects men and women equally; ΔE 58.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.47:1WCAG large text: AAA
Contrast with black, large text2.01:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 14.6Dark slateblue · ΔE 15.8Rebecca purple · ΔE 20.5Slate blue · ΔE 21Royal blue · ΔE 22.4Navy · ΔE 26.5
Nearest named CSS colourMidnight blue (#191970)ΔE 14.56, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#996200
Analogous#008399, #160099
Triadic#990037, #379900
Split complementary#991600, #839900
Tetradic#990083, #996200, #009915

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#669DFF
Lighter +30%#337CFF
Lighter +20%#005CFF
Lighter +10%#0049CC
Darker −10%#002566
Darker −20%#001233
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003799
Less saturated −25%#133C86

Channel breakdown

R0
G55
B153
Red0 (0%)
Green55 (21.6%)
Blue153 (60%)
Hue218.43°
Saturation (HSL)100%
Lightness30%
Dominant channelBlue
Hex per channelR 00 · G 37 · B 99

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Every value on this page was computed from “hex 003799” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.