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Recognised as Colour

#212F4E

  • #212F4E
  • Blue
  • Dark
  • Nearest: Dark slate grey

#212F4E is a blue with RGB values 33, 47, 78 and HSL 221°, 41%, 22%. It is a dark colour, so white text on it reaches 13.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#212F4E#212F4E
HEX#212F4E
RGBrgb(33, 47, 78)
RGB (0–1)0.1294, 0.1843, 0.3059
RGB percentages12.9%, 18.4%, 30.6%
HSLhsl(221.3, 40.5%, 21.8%)
HSV / HSBhsv(221.3, 57.7%, 30.6%)
CMYK57.7%, 39.7%, 0%, 69.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,174,798
CSS custom property--colour: #212F4E;

Brightness & contrast

Relative luminance0.02906WCAG 2.x, 0 is black and 1 is white
Perceived brightness48.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.28:1
Contrast with white13.28:1WCAG normal text: AAA
Contrast with black1.58:1WCAG normal text: Fail
Greyscale equivalent#2E2E2E
Inverted#DED0B1

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#23324Fno red cones; affects about 1% of men; ΔE 2.1 from the original
Deuteranopia#1E2E4Dno green cones; the most common form, about 1% of men; ΔE 0.8 from the original
Tritanopia#0B363Ano blue cones; rare, and affects men and women equally; ΔE 22.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.28:1WCAG large text: AAA
Contrast with black, large text1.58:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 26.4Black · ΔE 29.1Dark slateblue · ΔE 32.1Dim grey · ΔE 32.7Slate grey · ΔE 35.4Steel blue · ΔE 35.8
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 26.37, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4E4021
Analogous#21454E, #2A214E
Triadic#4E212F, #2F4E21
Split complementary#4E2A21, #454E21
Tetradic#4E2145, #4E4021, #214E2A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#768FC5
Lighter +30%#5271B6
Lighter +20%#3F5A96
Lighter +10%#304572
Darker −10%#12192A
Darker −20%#030406
Darker −30%#000000
Darker −40%#000000
More saturated +25%#132A5C
Less saturated −25%#2F3440

Channel breakdown

R33
G47
B78
Red33 (12.9%)
Green47 (18.4%)
Blue78 (30.6%)
Hue221.33°
Saturation (HSL)40.54%
Lightness21.76%
Dominant channelBlue
Hex per channelR 21 · G 2F · B 4E

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Every value on this page was computed from “212f4e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.