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Recognised as Colour

#173EA2

  • #173EA2
  • Blue
  • Dark
  • Nearest: Dark slateblue

#173EA2 is a blue with RGB values 23, 62, 162 and HSL 223°, 75%, 36%. It is a dark colour, so white text on it reaches 9.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#173EA2#173EA2
HEX#173EA2
RGBrgb(23, 62, 162)
RGB (0–1)0.0902, 0.2431, 0.6353
RGB percentages9%, 24.3%, 63.5%
HSLhsl(223.2, 75.1%, 36.3%)
HSV / HSBhsv(223.2, 85.8%, 63.5%)
CMYK85.8%, 61.7%, 0%, 36.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,523,362
CSS custom property--colour: #173EA2;

Brightness & contrast

Relative luminance0.06236WCAG 2.x, 0 is black and 1 is white
Perceived brightness73.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.34:1
Contrast with white9.34:1WCAG normal text: AAA
Contrast with black2.25:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#E8C15D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004DA5no red cones; affects about 1% of men; ΔE 12 from the original
Deuteranopia#0040A0no green cones; the most common form, about 1% of men; ΔE 3.5 from the original
Tritanopia#00586Ano blue cones; rare, and affects men and women equally; ΔE 58.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.34:1WCAG large text: AAA
Contrast with black, large text2.25:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 15.5Midnight blue · ΔE 17.2Slate blue · ΔE 18.2Royal blue · ΔE 19.4Rebecca purple · ΔE 19.9Indigo · ΔE 27.6
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.54, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A27B17
Analogous#1784A2, #3517A2
Triadic#A2173E, #3EA217
Split complementary#A23517, #84A217
Tetradic#A21784, #A27B17, #17A235

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#95AFF0
Lighter +30%#688DEA
Lighter +20%#3C6BE3
Lighter +10%#1D4FCF
Darker −10%#112D75
Darker −20%#0A1C49
Darker −30%#040B1C
Darker −40%#000000
More saturated +25%#0034B9
Less saturated −25%#2E488B

Channel breakdown

R23
G62
B162
Red23 (9%)
Green62 (24.3%)
Blue162 (63.5%)
Hue223.17°
Saturation (HSL)75.14%
Lightness36.27%
Dominant channelBlue
Hex per channelR 17 · G 3E · B A2

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Every value on this page was computed from “173ea2” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.