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Colour

#171C68

  • #171C68
  • Blue
  • Dark
  • Nearest: Midnight blue

#171C68 is a blue with RGB values 23, 28, 104 and HSL 236°, 64%, 25%. It is a dark colour, so white text on it reaches 15:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#171C68#171C68
HEX#171C68
RGBrgb(23, 28, 104)
RGB (0–1)0.0902, 0.1098, 0.4078
RGB percentages9%, 11%, 40.8%
HSLhsl(236.3, 63.8%, 24.9%)
HSV / HSBhsv(236.3, 77.9%, 40.8%)
CMYK77.9%, 73.1%, 0%, 59.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,514,600
CSS custom property--colour: #171C68;

Brightness & contrast

Relative luminance0.02012WCAG 2.x, 0 is black and 1 is white
Perceived brightness43 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.97:1
Contrast with white14.97:1WCAG normal text: AAA
Contrast with black1.4:1WCAG normal text: Fail
Greyscale equivalent#202020
Inverted#E8E397

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002B6Ano red cones; affects about 1% of men; ΔE 13.3 from the original
Deuteranopia#002367no green cones; the most common form, about 1% of men; ΔE 7.7 from the original
Tritanopia#00313Fno blue cones; rare, and affects men and women equally; ΔE 48 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.97:1WCAG large text: AAA
Contrast with black, large text1.4:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 7Dark slateblue · ΔE 15.5Rebecca purple · ΔE 23.9Indigo · ΔE 26.9Navy · ΔE 29Dark blue · ΔE 33.7
Nearest named CSS colourMidnight blue (#191970)ΔE 6.98, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#686317
Analogous#174468, #3A1768
Triadic#68171C, #1C6817
Split complementary#683B17, #446817
Tetradic#681745, #686317, #17683B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6C73DF
Lighter +30%#434CD5
Lighter +20%#2932BC
Lighter +10%#202792
Darker −10%#0E113E
Darker −20%#050614
Darker −30%#000000
Darker −40%#000000
More saturated +25%#070E78
Less saturated −25%#272A58

Channel breakdown

R23
G28
B104
Red23 (9%)
Green28 (11%)
Blue104 (40.8%)
Hue236.3°
Saturation (HSL)63.78%
Lightness24.9%
Dominant channelBlue
Hex per channelR 17 · G 1C · B 68

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Every value on this page was computed from “171c68” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.