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Colour

#003373

  • #003373
  • Blue
  • Dark
  • Nearest: Dark slateblue

#003373 is a blue with RGB values 0, 51, 115 and HSL 213°, 100%, 23%. It is a dark colour, so white text on it reaches 12.2:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#003373#003373
HEX#003373
RGBrgb(0, 51, 115)
RGB (0–1)0, 0.2, 0.451
RGB percentages0%, 20%, 45.1%
HSLhsl(213.4, 100%, 22.5%)
HSV / HSBhsv(213.4, 100%, 45.1%)
CMYK100%, 55.7%, 0%, 54.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,171
CSS custom property--colour: #003373;

Brightness & contrast

Relative luminance0.03605WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.2:1
Contrast with white12.2:1WCAG normal text: AAA
Contrast with black1.72:1WCAG normal text: Fail
Greyscale equivalent#2D2D2D
Inverted#FFCC8C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003B75no red cones; affects about 1% of men; ΔE 6.3 from the original
Deuteranopia#003172no green cones; the most common form, about 1% of men; ΔE 1.3 from the original
Tritanopia#00434Dno blue cones; rare, and affects men and women equally; ΔE 40.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.2:1WCAG large text: AAA
Contrast with black, large text1.72:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 15.9Midnight blue · ΔE 21.9Rebecca purple · ΔE 32.6Steel blue · ΔE 35.6Slate blue · ΔE 36.9Royal blue · ΔE 37.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.89, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#734000
Analogous#006C73, #070073
Triadic#730033, #337300
Split complementary#730700, #6C7300
Tetradic#73006C, #734000, #007307

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#4095FF
Lighter +30%#0D78FF
Lighter +20%#0060D9
Lighter +10%#004AA6
Darker −10%#001C40
Darker −20%#00060D
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003373
Less saturated −25%#0E3565

Channel breakdown

R0
G51
B115
Red0 (0%)
Green51 (20%)
Blue115 (45.1%)
Hue213.39°
Saturation (HSL)100%
Lightness22.55%
Dominant channelBlue
Hex per channelR 00 · G 33 · B 73

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Every value on this page was computed from “hex 003373” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.