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Colour

#003388

  • #003388
  • Blue
  • Dark
  • Nearest: Dark slateblue

#003388 is a blue with RGB values 0, 51, 136 and HSL 218°, 100%, 27%. It is a dark colour, so white text on it reaches 11.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#003388#003388
HEX#003388
HEX (short)#038
RGBrgb(0, 51, 136)
RGB (0–1)0, 0.2, 0.5333
RGB percentages0%, 20%, 53.3%
HSLhsl(217.5, 100%, 26.7%)
HSV / HSBhsv(217.5, 100%, 53.3%)
CMYK100%, 62.5%, 0%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,192
CSS custom property--colour: #003388;

Brightness & contrast

Relative luminance0.04145WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.48:1
Contrast with white11.48:1WCAG normal text: AAA
Contrast with black1.83:1WCAG normal text: Fail
Greyscale equivalent#2E2E2E
Inverted#FFCC77

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003F8Bno red cones; affects about 1% of men; ΔE 9.2 from the original
Deuteranopia#003486no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#004958no blue cones; rare, and affects men and women equally; ΔE 51.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.48:1WCAG large text: AAA
Contrast with black, large text1.83:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 12.1Midnight blue · ΔE 13Rebecca purple · ΔE 23.2Slate blue · ΔE 26.3Royal blue · ΔE 27.9Indigo · ΔE 30.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 12.1, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#885500
Analogous#007788, #110088
Triadic#880033, #338800
Split complementary#881100, #778800
Tetradic#880077, #885500, #008811

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5595FF
Lighter +30%#2275FF
Lighter +20%#0059EE
Lighter +10%#0046BB
Darker −10%#002055
Darker −20%#000D22
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003388
Less saturated −25%#113777

Channel breakdown

R0
G51
B136
Red0 (0%)
Green51 (20%)
Blue136 (53.3%)
Hue217.5°
Saturation (HSL)100%
Lightness26.67%
Dominant channelBlue
Hex per channelR 00 · G 33 · B 88

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Every value on this page was computed from “hex 003388” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.