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Recognised as Colour

#212F2F

  • #212F2F
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#212F2F is a cyan with RGB values 33, 47, 47 and HSL 180°, 18%, 16%. It is a dark colour, so white text on it reaches 13.9:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#212F2F#212F2F
HEX#212F2F
RGBrgb(33, 47, 47)
RGB (0–1)0.1294, 0.1843, 0.1843
RGB percentages12.9%, 18.4%, 18.4%
HSLhsl(180, 17.5%, 15.7%)
HSV / HSBhsv(180, 29.8%, 18.4%)
CMYK29.8%, 0%, 0%, 81.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,174,767
CSS custom property--colour: #212F2F;

Brightness & contrast

Relative luminance0.02562WCAG 2.x, 0 is black and 1 is white
Perceived brightness43.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.89:1
Contrast with white13.89:1WCAG normal text: AAA
Contrast with black1.51:1WCAG normal text: Fail
Greyscale equivalent#2C2C2C
Inverted#DED0D0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2D2E2Fno red cones; affects about 1% of men; ΔE 5.8 from the original
Deuteranopia#2A2C2Fno green cones; the most common form, about 1% of men; ΔE 5.7 from the original
Tritanopia#1C302Fno blue cones; rare, and affects men and women equally; ΔE 2.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.89:1WCAG large text: AAA
Contrast with black, large text1.51:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 14.4Black · ΔE 19.2Dim grey · ΔE 26.9Slate grey · ΔE 35.9Gray · ΔE 35.9Teal · ΔE 38.4
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 14.44, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#2F2121
Analogous#212F28, #21282F
Triadic#2F212F, #2F2F21
Split complementary#2F2128, #2F2821
Tetradic#28212F, #2F2121, #282F21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7AA2A2
Lighter +30%#608989
Lighter +20%#4B6B6B
Lighter +10%#364D4D
Darker −10%#0C1111
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#173939
Less saturated −25%#282828

Channel breakdown

R33
G47
B47
Red33 (12.9%)
Green47 (18.4%)
Blue47 (18.4%)
Hue180°
Saturation (HSL)17.5%
Lightness15.69%
Dominant channelGreen and Blue
Hex per channelR 21 · G 2F · B 2F

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Every value on this page was computed from “212f2f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.