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Recognised as Colour

#223AA4

  • #223AA4
  • Blue
  • Dark
  • Nearest: Slate blue

#223AA4 is a blue with RGB values 34, 58, 164 and HSL 229°, 66%, 39%. It is a dark colour, so white text on it reaches 9.5:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#223AA4#223AA4
HEX#223AA4
RGBrgb(34, 58, 164)
RGB (0–1)0.1333, 0.2275, 0.6431
RGB percentages13.3%, 22.7%, 64.3%
HSLhsl(228.9, 65.7%, 38.8%)
HSV / HSBhsv(228.9, 79.3%, 64.3%)
CMYK79.3%, 64.6%, 0%, 35.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,243,236
CSS custom property--colour: #223AA4;

Brightness & contrast

Relative luminance0.06047WCAG 2.x, 0 is black and 1 is white
Perceived brightness73.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.51:1
Contrast with white9.51:1WCAG normal text: AAA
Contrast with black2.21:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#DDC55B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004CA7no red cones; affects about 1% of men; ΔE 14.8 from the original
Deuteranopia#0040A2no green cones; the most common form, about 1% of men; ΔE 7.3 from the original
Tritanopia#005669no blue cones; rare, and affects men and women equally; ΔE 62.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.51:1WCAG large text: AAA
Contrast with black, large text2.21:1WCAG large text: Fail

Named colours

Slate blue · ΔE 16.8Midnight blue · ΔE 17Rebecca purple · ΔE 17.8Dark slateblue · ΔE 18.1Royal blue · ΔE 19.6Indigo · ΔE 23.8
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 16.82, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A48C22
Analogous#227BA4, #4B22A4
Triadic#A4223A, #3AA422
Split complementary#A44B22, #7BA422
Tetradic#A4227B, #A48C22, #22A44B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A6B3EC
Lighter +30%#7B8FE4
Lighter +20%#516BDB
Lighter +10%#2B49CE
Darker −10%#192B7A
Darker −20%#101C50
Darker −30%#080D25
Darker −40%#000000
More saturated +25%#092ABD
Less saturated −25%#3B4A8B

Channel breakdown

R34
G58
B164
Red34 (13.3%)
Green58 (22.7%)
Blue164 (64.3%)
Hue228.92°
Saturation (HSL)65.66%
Lightness38.82%
Dominant channelBlue
Hex per channelR 22 · G 3A · B A4

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Every value on this page was computed from “223aa4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.