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Recognised as Colour

#223D54

  • #223D54
  • Blue
  • Dark
  • Nearest: Dark slate grey

#223D54 is a blue with RGB values 34, 61, 84 and HSL 208°, 42%, 23%. It is a dark colour, so white text on it reaches 11.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#223D54#223D54
HEX#223D54
RGBrgb(34, 61, 84)
RGB (0–1)0.1333, 0.2392, 0.3294
RGB percentages13.3%, 23.9%, 32.9%
HSLhsl(207.6, 42.4%, 23.1%)
HSV / HSBhsv(207.6, 59.5%, 32.9%)
CMYK59.5%, 27.4%, 0%, 67.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,243,924
CSS custom property--colour: #223D54;

Brightness & contrast

Relative luminance0.04318WCAG 2.x, 0 is black and 1 is white
Perceived brightness57.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.27:1
Contrast with white11.27:1WCAG normal text: AAA
Contrast with black1.86:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#DDC2AB

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#333D55no red cones; affects about 1% of men; ΔE 5.6 from the original
Deuteranopia#2D3854no green cones; the most common form, about 1% of men; ΔE 6.7 from the original
Tritanopia#024245no blue cones; rare, and affects men and women equally; ΔE 17.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.27:1WCAG large text: AAA
Contrast with black, large text1.86:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 17.4Dim grey · ΔE 26.2Slate grey · ΔE 28.9Black · ΔE 30.1Steel blue · ΔE 31.7Light slate grey · ΔE 31.8
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 17.42, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#543922
Analogous#225452, #222454
Triadic#54223D, #3D5422
Split complementary#542224, #545222
Tetradic#522254, #543922, #245422

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#79A4C9
Lighter +30%#558CBA
Lighter +20%#3F729D
Lighter +10%#315778
Darker −10%#132330
Darker −20%#05080B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#133E63
Less saturated −25%#313C45

Channel breakdown

R34
G61
B84
Red34 (13.3%)
Green61 (23.9%)
Blue84 (32.9%)
Hue207.6°
Saturation (HSL)42.37%
Lightness23.14%
Dominant channelBlue
Hex per channelR 22 · G 3D · B 54

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Every value on this page was computed from “223d54” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.