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Recognised as Colour

#2161B2

  • #2161B2
  • Blue
  • Dark
  • Nearest: Dark slateblue

#2161B2 is a blue with RGB values 33, 97, 178 and HSL 214°, 69%, 41%. It is a dark colour, so white text on it reaches 6.1:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#2161B2#2161B2
HEX#2161B2
RGBrgb(33, 97, 178)
RGB (0–1)0.1294, 0.3804, 0.698
RGB percentages12.9%, 38%, 69.8%
HSLhsl(213.5, 68.7%, 41.4%)
HSV / HSBhsv(213.5, 81.5%, 69.8%)
CMYK81.5%, 45.5%, 0%, 30.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,187,698
CSS custom property--colour: #2161B2;

Brightness & contrast

Relative luminance0.12087WCAG 2.x, 0 is black and 1 is white
Perceived brightness97.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.14:1
Contrast with white6.14:1WCAG normal text: AA
Contrast with black3.42:1WCAG normal text: Fail
Greyscale equivalent#595959
Inverted#DE9E4D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3669B5no red cones; affects about 1% of men; ΔE 4.8 from the original
Deuteranopia#145BB0no green cones; the most common form, about 1% of men; ΔE 3.8 from the original
Tritanopia#007481no blue cones; rare, and affects men and women equally; ΔE 46.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.14:1WCAG large text: AAA
Contrast with black, large text3.42:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 20.3Cornflower blue · ΔE 20.6Dodgerblue · ΔE 23.2Royal blue · ΔE 24.1Steel blue · ΔE 24.4Slate blue · ΔE 27.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 20.32, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B27221
Analogous#21AAB2, #2921B2
Triadic#B22161, #61B221
Split complementary#B22A21, #AAB221
Tetradic#B221AA, #B27221, #21B229

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AFCCF0
Lighter +30%#84B0E8
Lighter +20%#5995E0
Lighter +10%#2E79D8
Darker −10%#194A87
Darker −20%#11325C
Darker −30%#091B31
Darker −40%#010306
More saturated +25%#075ECC
Less saturated −25%#3B6498

Channel breakdown

R33
G97
B178
Red33 (12.9%)
Green97 (38%)
Blue178 (69.8%)
Hue213.52°
Saturation (HSL)68.72%
Lightness41.37%
Dominant channelBlue
Hex per channelR 21 · G 61 · B B2

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Every value on this page was computed from “2161b2” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.