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Recognised as Colour

#223C63

  • #223C63
  • Blue
  • Dark
  • Nearest: Dark slate grey

#223C63 is a blue with RGB values 34, 60, 99 and HSL 216°, 49%, 26%. It is a dark colour, so white text on it reaches 11.1:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#223C63#223C63
HEX#223C63
RGBrgb(34, 60, 99)
RGB (0–1)0.1333, 0.2353, 0.3882
RGB percentages13.3%, 23.5%, 38.8%
HSLhsl(216, 48.9%, 26.1%)
HSV / HSBhsv(216, 65.7%, 38.8%)
CMYK65.7%, 39.4%, 0%, 61.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,243,683
CSS custom property--colour: #223C63;

Brightness & contrast

Relative luminance0.04473WCAG 2.x, 0 is black and 1 is white
Perceived brightness59.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.08:1
Contrast with white11.08:1WCAG normal text: AAA
Contrast with black1.89:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#DDC39C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2B3F65no red cones; affects about 1% of men; ΔE 2.2 from the original
Deuteranopia#223962no green cones; the most common form, about 1% of men; ΔE 2.2 from the original
Tritanopia#00454Ano blue cones; rare, and affects men and women equally; ΔE 27.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.08:1WCAG large text: AAA
Contrast with black, large text1.89:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 27.8Dark slateblue · ΔE 28Steel blue · ΔE 29.1Slate grey · ΔE 32.2Dim grey · ΔE 32.6Light slate grey · ΔE 34.7
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 27.82, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#634922
Analogous#225D63, #282263
Triadic#63223C, #3C6322
Split complementary#632922, #5D6322
Tetradic#63225D, #634922, #226329

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7EA0D3
Lighter +30%#5884C6
Lighter +20%#3C6AAF
Lighter +10%#2F5389
Darker −10%#15253D
Darker −20%#080E17
Darker −30%#000000
Darker −40%#000000
More saturated +25%#113974
Less saturated −25%#333F52

Channel breakdown

R34
G60
B99
Red34 (13.3%)
Green60 (23.5%)
Blue99 (38.8%)
Hue216°
Saturation (HSL)48.87%
Lightness26.08%
Dominant channelBlue
Hex per channelR 22 · G 3C · B 63

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Every value on this page was computed from “223c63” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.