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Recognised as Colour

#2143AD

  • #2143AD
  • Blue
  • Dark
  • Nearest: Slate blue

#2143AD is a blue with RGB values 33, 67, 173 and HSL 225°, 68%, 40%. It is a dark colour, so white text on it reaches 8.5:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#2143AD#2143AD
HEX#2143AD
RGBrgb(33, 67, 173)
RGB (0–1)0.1294, 0.2627, 0.6784
RGB percentages12.9%, 26.3%, 67.8%
HSLhsl(225.4, 68%, 40.4%)
HSV / HSBhsv(225.4, 80.9%, 67.8%)
CMYK80.9%, 61.3%, 0%, 32.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,180,013
CSS custom property--colour: #2143AD;

Brightness & contrast

Relative luminance0.07355WCAG 2.x, 0 is black and 1 is white
Perceived brightness79.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.5:1
Contrast with white8.5:1WCAG normal text: AAA
Contrast with black2.47:1WCAG normal text: Fail
Greyscale equivalent#434343
Inverted#DEBC52

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0053B0no red cones; affects about 1% of men; ΔE 13 from the original
Deuteranopia#0046ABno green cones; the most common form, about 1% of men; ΔE 4.8 from the original
Tritanopia#005E71no blue cones; rare, and affects men and women equally; ΔE 61.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.5:1WCAG large text: AAA
Contrast with black, large text2.47:1WCAG large text: Fail

Named colours

Slate blue · ΔE 15.3Royal blue · ΔE 16.2Dark slateblue · ΔE 18Rebecca purple · ΔE 19.7Midnight blue · ΔE 20Medium slateblue · ΔE 24.2
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 15.25, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AD8B21
Analogous#2189AD, #4521AD
Triadic#AD2143, #43AD21
Split complementary#AD4521, #89AD21
Tetradic#AD2189, #AD8B21, #21AD45

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ABBCEF
Lighter +30%#8099E7
Lighter +20%#5577DF
Lighter +10%#2B54D6
Darker −10%#193282
Darker −20%#112257
Darker −30%#08112D
Darker −40%#000102
More saturated +25%#0736C7
Less saturated −25%#3B5093

Channel breakdown

R33
G67
B173
Red33 (12.9%)
Green67 (26.3%)
Blue173 (67.8%)
Hue225.43°
Saturation (HSL)67.96%
Lightness40.39%
Dominant channelBlue
Hex per channelR 21 · G 43 · B AD

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Every value on this page was computed from “2143ad” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.