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Recognised as Colour

#174EAA

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

#174EAA is a blue with RGB values 23, 78, 170 and HSL 218°, 76%, 38%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#174EAA#174EAA
HEX#174EAA
RGBrgb(23, 78, 170)
RGB (0–1)0.0902, 0.3059, 0.6667
RGB percentages9%, 30.6%, 66.7%
HSLhsl(217.6, 76.2%, 37.8%)
HSV / HSBhsv(217.6, 86.5%, 66.7%)
CMYK86.5%, 54.1%, 0%, 33.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,527,466
CSS custom property--colour: #174EAA;

Brightness & contrast

Relative luminance0.08533WCAG 2.x, 0 is black and 1 is white
Perceived brightness83.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.76:1
Contrast with white7.76:1WCAG normal text: AAA
Contrast with black2.71:1WCAG normal text: Fail
Greyscale equivalent#494949
Inverted#E8B155

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0059ADno red cones; affects about 1% of men; ΔE 8.5 from the original
Deuteranopia#004CA8no green cones; the most common form, about 1% of men; ΔE 1.4 from the original
Tritanopia#006574no blue cones; rare, and affects men and women equally; ΔE 54 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.76:1WCAG large text: AAA
Contrast with black, large text2.71:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 14.8Royal blue · ΔE 18.6Slate blue · ΔE 20.6Midnight blue · ΔE 23.8Rebecca purple · ΔE 25.5Medium purple · ΔE 27.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 14.84, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AA7317
Analogous#1798AA, #2917AA
Triadic#AA174E, #4EAA17
Split complementary#AA2917, #98AA17
Tetradic#AA1798, #AA7317, #17AA29

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9BBCF2
Lighter +30%#6F9DEB
Lighter +20%#427FE5
Lighter +10%#1D63D7
Darker −10%#11397D
Darker −20%#0B2550
Darker −30%#051023
Darker −40%#000000
More saturated +25%#0048C1
Less saturated −25%#2F5492

Channel breakdown

R23
G78
B170
Red23 (9%)
Green78 (30.6%)
Blue170 (66.7%)
Hue217.55°
Saturation (HSL)76.17%
Lightness37.84%
Dominant channelBlue
Hex per channelR 17 · G 4E · B AA

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