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Recognised as Colour

#174A90

  • #174A90
  • Blue
  • Dark
  • Nearest: Dark slateblue

#174A90 is a blue with RGB values 23, 74, 144 and HSL 215°, 72%, 33%. It is a dark colour, so white text on it reaches 8.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#174A90#174A90
HEX#174A90
RGBrgb(23, 74, 144)
RGB (0–1)0.0902, 0.2902, 0.5647
RGB percentages9%, 29%, 56.5%
HSLhsl(214.7, 72.5%, 32.7%)
HSV / HSBhsv(214.7, 84%, 56.5%)
CMYK84%, 48.6%, 0%, 43.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,526,416
CSS custom property--colour: #174A90;

Brightness & contrast

Relative luminance0.07093WCAG 2.x, 0 is black and 1 is white
Perceived brightness75.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.68:1
Contrast with white8.68:1WCAG normal text: AAA
Contrast with black2.42:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#E8B56F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#225193no red cones; affects about 1% of men; ΔE 4.2 from the original
Deuteranopia#00468Fno green cones; the most common form, about 1% of men; ΔE 2.9 from the original
Tritanopia#005B66no blue cones; rare, and affects men and women equally; ΔE 42.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.68:1WCAG large text: AAA
Contrast with black, large text2.42:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 15.5Midnight blue · ΔE 27.3Steel blue · ΔE 27.6Cornflower blue · ΔE 30.5Royal blue · ΔE 31.2Slate blue · ΔE 32.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.52, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#905D17
Analogous#178790, #201790
Triadic#90174A, #4A9017
Split complementary#902017, #869017
Tetradic#901787, #905D17, #179020

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#87B2EC
Lighter +30%#5B95E5
Lighter +20%#2F79DE
Lighter +10%#1E61BC
Darker −10%#103364
Darker −20%#091D38
Darker −30%#02060C
Darker −40%#000000
More saturated +25%#0247A5
Less saturated −25%#2C4D7B

Channel breakdown

R23
G74
B144
Red23 (9%)
Green74 (29%)
Blue144 (56.5%)
Hue214.71°
Saturation (HSL)72.46%
Lightness32.75%
Dominant channelBlue
Hex per channelR 17 · G 4A · B 90

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Every value on this page was computed from “174a90” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.