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Recognised as Colour

#223B63

  • #223B63
  • Blue
  • Dark
  • Nearest: Dark slateblue

#223B63 is a blue with RGB values 34, 59, 99 and HSL 217°, 49%, 26%. It is a dark colour, so white text on it reaches 11.2:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#223B63#223B63
HEX#223B63
RGBrgb(34, 59, 99)
RGB (0–1)0.1333, 0.2314, 0.3882
RGB percentages13.3%, 23.1%, 38.8%
HSLhsl(216.9, 48.9%, 26.1%)
HSV / HSBhsv(216.9, 65.7%, 38.8%)
CMYK65.7%, 40.4%, 0%, 61.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,243,427
CSS custom property--colour: #223B63;

Brightness & contrast

Relative luminance0.04369WCAG 2.x, 0 is black and 1 is white
Perceived brightness59.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.21:1
Contrast with white11.21:1WCAG normal text: AAA
Contrast with black1.87:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#DDC49C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2A3E65no red cones; affects about 1% of men; ΔE 2 from the original
Deuteranopia#213862no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#00444Ano blue cones; rare, and affects men and women equally; ΔE 27.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.21:1WCAG large text: AAA
Contrast with black, large text1.87:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 27.3Dark slate grey · ΔE 28.7Steel blue · ΔE 29.4Slate grey · ΔE 32.9Dim grey · ΔE 33.3Light slate grey · ΔE 35.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 27.28, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#634A22
Analogous#225C63, #292263
Triadic#63223B, #3B6322
Split complementary#632922, #5C6322
Tetradic#63225C, #634A22, #226329

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7E9FD3
Lighter +30%#5882C6
Lighter +20%#3C68AF
Lighter +10%#2F5289
Darker −10%#15243D
Darker −20%#080E17
Darker −30%#000000
Darker −40%#000000
More saturated +25%#113774
Less saturated −25%#333F52

Channel breakdown

R34
G59
B99
Red34 (13.3%)
Green59 (23.1%)
Blue99 (38.8%)
Hue216.92°
Saturation (HSL)48.87%
Lightness26.08%
Dominant channelBlue
Hex per channelR 22 · G 3B · B 63

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Every value on this page was computed from “223b63” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.