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Recognised as Colour

#223A79

  • #223A79
  • Blue
  • Dark
  • Nearest: Dark slateblue

#223A79 is a blue with RGB values 34, 58, 121 and HSL 223°, 56%, 30%. It is a dark colour, so white text on it reaches 10.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#223A79#223A79
HEX#223A79
RGBrgb(34, 58, 121)
RGB (0–1)0.1333, 0.2275, 0.4745
RGB percentages13.3%, 22.7%, 47.5%
HSLhsl(223.4, 56.1%, 30.4%)
HSV / HSBhsv(223.4, 71.9%, 47.5%)
CMYK71.9%, 52.1%, 0%, 52.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,243,193
CSS custom property--colour: #223A79;

Brightness & contrast

Relative luminance0.04747WCAG 2.x, 0 is black and 1 is white
Perceived brightness63.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.77:1
Contrast with white10.77:1WCAG normal text: AAA
Contrast with black1.95:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#DDC586

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#16427Bno red cones; affects about 1% of men; ΔE 7.1 from the original
Deuteranopia#003A78no green cones; the most common form, about 1% of men; ΔE 4.3 from the original
Tritanopia#004953no blue cones; rare, and affects men and women equally; ΔE 40.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.77:1WCAG large text: AAA
Contrast with black, large text1.95:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.6Midnight blue · ΔE 23.3Rebecca purple · ΔE 31Steel blue · ΔE 32.6Slate blue · ΔE 35.1Royal blue · ΔE 36.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.59, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#796122
Analogous#226679, #352279
Triadic#79223A, #3A7922
Split complementary#793522, #667922
Tetradic#792266, #796122, #227935

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#89A1DE
Lighter +30%#6181D3
Lighter +20%#3961C8
Lighter +10%#2D4DA1
Darker −10%#172751
Darker −20%#0C1429
Darker −30%#000102
Darker −40%#000000
More saturated +25%#0F318C
Less saturated −25%#354366

Channel breakdown

R34
G58
B121
Red34 (13.3%)
Green58 (22.7%)
Blue121 (47.5%)
Hue223.45°
Saturation (HSL)56.13%
Lightness30.39%
Dominant channelBlue
Hex per channelR 22 · G 3A · B 79

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Every value on this page was computed from “223a79” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.