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Recognised as Colour

#171F7C

  • #171F7C
  • Blue
  • Dark
  • Nearest: Midnight blue

#171F7C is a blue with RGB values 23, 31, 124 and HSL 235°, 69%, 29%. It is a dark colour, so white text on it reaches 13.8:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#171F7C#171F7C
HEX#171F7C
RGBrgb(23, 31, 124)
RGB (0–1)0.0902, 0.1216, 0.4863
RGB percentages9%, 12.2%, 48.6%
HSLhsl(235.2, 68.7%, 28.8%)
HSV / HSBhsv(235.2, 81.5%, 48.6%)
CMYK81.5%, 75%, 0%, 51.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,515,388
CSS custom property--colour: #171F7C;

Brightness & contrast

Relative luminance0.02617WCAG 2.x, 0 is black and 1 is white
Perceived brightness49.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.78:1
Contrast with white13.78:1WCAG normal text: AAA
Contrast with black1.52:1WCAG normal text: Fail
Greyscale equivalent#242424
Inverted#E8E083

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00327Fno red cones; affects about 1% of men; ΔE 15.3 from the original
Deuteranopia#00287Ano green cones; the most common form, about 1% of men; ΔE 9.2 from the original
Tritanopia#003A4Bno blue cones; rare, and affects men and women equally; ΔE 56.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text13.78:1WCAG large text: AAA
Contrast with black, large text1.52:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 4.3Dark slateblue · ΔE 17.6Rebecca purple · ΔE 18.9Indigo · ΔE 19.6Navy · ΔE 20Dark blue · ΔE 24.3
Nearest named CSS colourMidnight blue (#191970)ΔE 4.34, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7C7417
Analogous#17527C, #41177C
Triadic#7C171F, #1F7C17
Split complementary#7C4117, #527C17
Tetradic#7C1752, #7C7417, #177C41

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7982E6
Lighter +30%#4E59DE
Lighter +20%#2735D2
Lighter +10%#1F2AA7
Darker −10%#0F1451
Darker −20%#070926
Darker −30%#000000
Darker −40%#000000
More saturated +25%#05108E
Less saturated −25%#292E6A

Channel breakdown

R23
G31
B124
Red23 (9%)
Green31 (12.2%)
Blue124 (48.6%)
Hue235.25°
Saturation (HSL)68.71%
Lightness28.82%
Dominant channelBlue
Hex per channelR 17 · G 1F · B 7C

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Every value on this page was computed from “171f7c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.