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Recognised as Colour

#171D6D

  • #171D6D
  • Blue
  • Dark
  • Nearest: Midnight blue

#171D6D is a blue with RGB values 23, 29, 109 and HSL 236°, 65%, 26%. It is a dark colour, so white text on it reaches 14.7:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#171D6D#171D6D
HEX#171D6D
RGBrgb(23, 29, 109)
RGB (0–1)0.0902, 0.1137, 0.4275
RGB percentages9%, 11.4%, 42.7%
HSLhsl(235.8, 65.2%, 25.9%)
HSV / HSBhsv(235.8, 78.9%, 42.7%)
CMYK78.9%, 73.4%, 0%, 57.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,514,861
CSS custom property--colour: #171D6D;

Brightness & contrast

Relative luminance0.02165WCAG 2.x, 0 is black and 1 is white
Perceived brightness44.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.65:1
Contrast with white14.65:1WCAG normal text: AAA
Contrast with black1.43:1WCAG normal text: Fail
Greyscale equivalent#222222
Inverted#E8E292

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002D6Fno red cones; affects about 1% of men; ΔE 14 from the original
Deuteranopia#00246Cno green cones; the most common form, about 1% of men; ΔE 7.5 from the original
Tritanopia#003342no blue cones; rare, and affects men and women equally; ΔE 49.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.65:1WCAG large text: AAA
Contrast with black, large text1.43:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 4.8Dark slateblue · ΔE 15.4Rebecca purple · ΔE 22.4Indigo · ΔE 25.1Navy · ΔE 26.8Dark blue · ΔE 31.5
Nearest named CSS colourMidnight blue (#191970)ΔE 4.77, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6D6717
Analogous#17486D, #3C176D
Triadic#6D171D, #1D6D17
Split complementary#6D3C17, #486D17
Tetradic#6D1748, #6D6717, #176D3C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6F77E1
Lighter +30%#454FD8
Lighter +20%#2933C1
Lighter +10%#202897
Darker −10%#0E1243
Darker −20%#050719
Darker −30%#000000
Darker −40%#000000
More saturated +25%#060F7E
Less saturated −25%#272B5C

Channel breakdown

R23
G29
B109
Red23 (9%)
Green29 (11.4%)
Blue109 (42.7%)
Hue235.81°
Saturation (HSL)65.15%
Lightness25.88%
Dominant channelBlue
Hex per channelR 17 · G 1D · B 6D

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Every value on this page was computed from “171d6d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.