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Recognised as Colour

#042173

  • #042173
  • Blue
  • Dark
  • Nearest: Midnight blue

#042173 is a blue with RGB values 4, 33, 115 and HSL 224°, 93%, 23%. It is a dark colour, so white text on it reaches 14.3:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#042173#042173
HEX#042173
RGBrgb(4, 33, 115)
RGB (0–1)0.0157, 0.1294, 0.451
RGB percentages1.6%, 12.9%, 45.1%
HSLhsl(224.3, 93.3%, 23.3%)
HSV / HSBhsv(224.3, 96.5%, 45.1%)
CMYK96.5%, 71.3%, 0%, 54.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer270,707
CSS custom property--colour: #042173;

Brightness & contrast

Relative luminance0.02351WCAG 2.x, 0 is black and 1 is white
Perceived brightness46.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.28:1
Contrast with white14.28:1WCAG normal text: AAA
Contrast with black1.47:1WCAG normal text: Fail
Greyscale equivalent#212121
Inverted#FBDE8C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003076no red cones; affects about 1% of men; ΔE 12 from the original
Deuteranopia#002572no green cones; the most common form, about 1% of men; ΔE 4.2 from the original
Tritanopia#003847no blue cones; rare, and affects men and women equally; ΔE 50.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text14.28:1WCAG large text: AAA
Contrast with black, large text1.47:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 5.9Dark slateblue · ΔE 15.4Rebecca purple · ΔE 23.1Indigo · ΔE 26.2Navy · ΔE 26.8Slate blue · ΔE 31
Nearest named CSS colourMidnight blue (#191970)ΔE 5.85, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#735604
Analogous#045873, #1F0473
Triadic#730421, #217304
Split complementary#731F04, #587304
Tetradic#730458, #735604, #04731F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#4A78F9
Lighter +30%#1953F7
Lighter +20%#073DD6
Lighter +10%#062FA4
Darker −10%#021342
Darker −20%#010510
Darker −30%#000000
Darker −40%#000000
More saturated +25%#001F77
Less saturated −25%#132864

Channel breakdown

R4
G33
B115
Red4 (1.6%)
Green33 (12.9%)
Blue115 (45.1%)
Hue224.32°
Saturation (HSL)93.28%
Lightness23.33%
Dominant channelBlue
Hex per channelR 04 · G 21 · B 73

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Every value on this page was computed from “hex 042173” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.