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Recognised as Colour

#212F71

  • #212F71
  • Blue
  • Dark
  • Nearest: Dark slateblue

#212F71 is a blue with RGB values 33, 47, 113 and HSL 230°, 55%, 29%. It is a dark colour, so white text on it reaches 12.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#212F71#212F71
HEX#212F71
RGBrgb(33, 47, 113)
RGB (0–1)0.1294, 0.1843, 0.4431
RGB percentages12.9%, 18.4%, 44.3%
HSLhsl(229.5, 54.8%, 28.6%)
HSV / HSBhsv(229.5, 70.8%, 44.3%)
CMYK70.8%, 58.4%, 0%, 55.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,174,833
CSS custom property--colour: #212F71;

Brightness & contrast

Relative luminance0.03549WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.28:1
Contrast with white12.28:1WCAG normal text: AAA
Contrast with black1.71:1WCAG normal text: Fail
Greyscale equivalent#313131
Inverted#DED08E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003973no red cones; affects about 1% of men; ΔE 10.3 from the original
Deuteranopia#003170no green cones; the most common form, about 1% of men; ΔE 5.5 from the original
Tritanopia#003F4Bno blue cones; rare, and affects men and women equally; ΔE 41.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.28:1WCAG large text: AAA
Contrast with black, large text1.71:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 11.9Midnight blue · ΔE 17.7Rebecca purple · ΔE 27.9Slate blue · ΔE 34.3Indigo · ΔE 36.1Royal blue · ΔE 37
Nearest named CSS colourDark slateblue (#483D8B)ΔE 11.91, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#716321
Analogous#215771, #3B2171
Triadic#71212F, #2F7121
Split complementary#713B21, #577121
Tetradic#712157, #716321, #21713B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8393DB
Lighter +30%#5C70CF
Lighter +20%#3850C0
Lighter +10%#2D3F98
Darker −10%#151F4A
Darker −20%#0A0E22
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F2383
Less saturated −25%#333B5F

Channel breakdown

R33
G47
B113
Red33 (12.9%)
Green47 (18.4%)
Blue113 (44.3%)
Hue229.5°
Saturation (HSL)54.79%
Lightness28.63%
Dominant channelBlue
Hex per channelR 21 · G 2F · B 71

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Every value on this page was computed from “212f71” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.