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Recognised as Colour

#003173

  • #003173
  • Blue
  • Dark
  • Nearest: Dark slateblue

#003173 is a blue with RGB values 0, 49, 115 and HSL 214°, 100%, 23%. It is a dark colour, so white text on it reaches 12.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#003173#003173
HEX#003173
RGBrgb(0, 49, 115)
RGB (0–1)0, 0.1922, 0.451
RGB percentages0%, 19.2%, 45.1%
HSLhsl(214.4, 100%, 22.5%)
HSV / HSBhsv(214.4, 100%, 45.1%)
CMYK100%, 57.4%, 0%, 54.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,659
CSS custom property--colour: #003173;

Brightness & contrast

Relative luminance0.03434WCAG 2.x, 0 is black and 1 is white
Perceived brightness54 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.45:1
Contrast with white12.45:1WCAG normal text: AAA
Contrast with black1.69:1WCAG normal text: Fail
Greyscale equivalent#2B2B2B
Inverted#FFCE8C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003975no red cones; affects about 1% of men; ΔE 6.3 from the original
Deuteranopia#002F72no green cones; the most common form, about 1% of men; ΔE 1.3 from the original
Tritanopia#00424Dno blue cones; rare, and affects men and women equally; ΔE 41.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.45:1WCAG large text: AAA
Contrast with black, large text1.69:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 15Midnight blue · ΔE 20Rebecca purple · ΔE 31.3Slate blue · ΔE 35.9Royal blue · ΔE 37Steel blue · ΔE 37.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.01, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#734200
Analogous#006B73, #080073
Triadic#730031, #317300
Split complementary#730800, #6B7300
Tetradic#73006B, #734200, #007308

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#4091FF
Lighter +30%#0D74FF
Lighter +20%#005CD9
Lighter +10%#0047A6
Darker −10%#001B40
Darker −20%#00060D
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003173
Less saturated −25%#0E3365

Channel breakdown

R0
G49
B115
Red0 (0%)
Green49 (19.2%)
Blue115 (45.1%)
Hue214.43°
Saturation (HSL)100%
Lightness22.55%
Dominant channelBlue
Hex per channelR 00 · G 31 · B 73

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Every value on this page was computed from “hex 003173” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.