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Recognised as Colour

#171CE9

  • #171CE9
  • Blue
  • Dark
  • Nearest: Medium blue

#171CE9 is a blue with RGB values 23, 28, 233 and HSL 239°, 83%, 50%. It is a dark colour, so white text on it reaches 8.8:1 contrast (AAA for normal text). The nearest named colour is Medium blue.

Colour values

#171CE9#171CE9
HEX#171CE9
RGBrgb(23, 28, 233)
RGB (0–1)0.0902, 0.1098, 0.9137
RGB percentages9%, 11%, 91.4%
HSLhsl(238.6, 82.7%, 50.2%)
HSV / HSBhsv(238.6, 90.1%, 91.4%)
CMYK90.1%, 88%, 0%, 8.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,514,729
CSS custom property--colour: #171CE9;

Brightness & contrast

Relative luminance0.06896WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.83:1
Contrast with white8.83:1WCAG normal text: AAA
Contrast with black2.38:1WCAG normal text: Fail
Greyscale equivalent#2A2A2A
Inverted#E8E316

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0055EEno red cones; affects about 1% of men; ΔE 33.8 from the original
Deuteranopia#003EE6no green cones; the most common form, about 1% of men; ΔE 20.3 from the original
Tritanopia#00658Ano blue cones; rare, and affects men and women equally; ΔE 105.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.83:1WCAG large text: AAA
Contrast with black, large text2.38:1WCAG large text: Fail

Named colours

Medium blue · ΔE 8.4Blue · ΔE 15.9Blue violet · ΔE 24.4Dark violet · ΔE 28.7Dark blue · ΔE 37Dark orchid · ΔE 38.5
Nearest named CSS colourMedium blue (#0000CD)ΔE 8.39, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E9E417
Analogous#1785E9, #7B17E9
Triadic#E9171C, #1CE917
Split complementary#E97B17, #85E917
Tetradic#E91785, #E9E417, #17E97B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D1D2FB
Lighter +30%#A3A5F6
Lighter +20%#7477F2
Lighter +10%#464AED
Darker −10%#1216BB
Darker −20%#0D108D
Darker −30%#090B5E
Darker −40%#05062F
More saturated +25%#0107FF
Less saturated −25%#373AC9

Channel breakdown

R23
G28
B233
Red23 (9%)
Green28 (11%)
Blue233 (91.4%)
Hue238.57°
Saturation (HSL)82.68%
Lightness50.2%
Dominant channelBlue
Hex per channelR 17 · G 1C · B E9

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Every value on this page was computed from “171ce9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.