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Recognised as Colour

#223B3F

  • #223B3F
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#223B3F is a cyan with RGB values 34, 59, 63 and HSL 188°, 30%, 19%. It is a dark colour, so white text on it reaches 11.9:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#223B3F#223B3F
HEX#223B3F
RGBrgb(34, 59, 63)
RGB (0–1)0.1333, 0.2314, 0.2471
RGB percentages13.3%, 23.1%, 24.7%
HSLhsl(188.3, 29.9%, 19%)
HSV / HSBhsv(188.3, 46%, 24.7%)
CMYK46%, 6.3%, 0%, 75.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,243,391
CSS custom property--colour: #223B3F;

Brightness & contrast

Relative luminance0.03827WCAG 2.x, 0 is black and 1 is white
Perceived brightness53.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.9:1
Contrast with white11.9:1WCAG normal text: AAA
Contrast with black1.77:1WCAG normal text: Fail
Greyscale equivalent#363636
Inverted#DDC4C0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#37393Fno red cones; affects about 1% of men; ΔE 9.2 from the original
Deuteranopia#32363Fno green cones; the most common form, about 1% of men; ΔE 9 from the original
Tritanopia#163D3Cno blue cones; rare, and affects men and women equally; ΔE 5.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.9:1WCAG large text: AAA
Contrast with black, large text1.77:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 9Dim grey · ΔE 23.6Black · ΔE 25.2Slate grey · ΔE 30.8Gray · ΔE 32.1Teal · ΔE 32.6
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 9, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3F2622
Analogous#223F34, #222D3F
Triadic#3F223B, #3B3F22
Split complementary#3F222D, #3F3422
Tetradic#34223F, #3F2622, #2D3F22

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#77ADB6
Lighter +30%#5898A2
Lighter +20%#467981
Lighter +10%#345A60
Darker −10%#101C1E
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#16444B
Less saturated −25%#2E3233

Channel breakdown

R34
G59
B63
Red34 (13.3%)
Green59 (23.1%)
Blue63 (24.7%)
Hue188.28°
Saturation (HSL)29.9%
Lightness19.02%
Dominant channelBlue
Hex per channelR 22 · G 3B · B 3F

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Every value on this page was computed from “223b3f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.