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Recognised as Colour

#2163B5

  • #2163B5
  • Blue
  • Dark
  • Nearest: Cornflower blue

#2163B5 is a blue with RGB values 33, 99, 181 and HSL 213°, 69%, 42%. It is a dark colour, so white text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#2163B5#2163B5
HEX#2163B5
RGBrgb(33, 99, 181)
RGB (0–1)0.1294, 0.3882, 0.7098
RGB percentages12.9%, 38.8%, 71%
HSLhsl(213.2, 69.2%, 42%)
HSV / HSBhsv(213.2, 81.8%, 71%)
CMYK81.8%, 45.3%, 0%, 29%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,188,213
CSS custom property--colour: #2163B5;

Brightness & contrast

Relative luminance0.12583WCAG 2.x, 0 is black and 1 is white
Perceived brightness99.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.97:1
Contrast with white5.97:1WCAG normal text: AA
Contrast with black3.52:1WCAG normal text: Fail
Greyscale equivalent#5B5B5B
Inverted#DE9C4A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#386BB8no red cones; affects about 1% of men; ΔE 4.9 from the original
Deuteranopia#155DB3no green cones; the most common form, about 1% of men; ΔE 3.8 from the original
Tritanopia#007783no blue cones; rare, and affects men and women equally; ΔE 48.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.97:1WCAG large text: AAA
Contrast with black, large text3.52:1WCAG large text: AA

Named colours

Cornflower blue · ΔE 19.8Dark slateblue · ΔE 21Dodgerblue · ΔE 22.3Royal blue · ΔE 23.6Steel blue · ΔE 24.3Slate blue · ΔE 27.7
Nearest named CSS colourCornflower blue (#6495ED)ΔE 19.81, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B57321
Analogous#21ADB5, #2921B5
Triadic#B52163, #63B521
Split complementary#B52921, #ADB521
Tetradic#B521AD, #B57321, #21B529

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B1CEF1
Lighter +30%#86B2E9
Lighter +20%#5B97E1
Lighter +10%#307BD9
Darker −10%#194B8A
Darker −20%#11345F
Darker −30%#091C34
Darker −40%#020508
More saturated +25%#0660D0
Less saturated −25%#3C669A

Channel breakdown

R33
G99
B181
Red33 (12.9%)
Green99 (38.8%)
Blue181 (71%)
Hue213.24°
Saturation (HSL)69.16%
Lightness41.96%
Dominant channelBlue
Hex per channelR 21 · G 63 · B B5

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Every value on this page was computed from “2163b5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.