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Recognised as Colour

#21372F

  • #21372F
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#21372F is a cyan with RGB values 33, 55, 47 and HSL 158°, 25%, 17%. It is a dark colour, so white text on it reaches 12.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#21372F#21372F
HEX#21372F
RGBrgb(33, 55, 47)
RGB (0–1)0.1294, 0.2157, 0.1843
RGB percentages12.9%, 21.6%, 18.4%
HSLhsl(158.2, 25%, 17.3%)
HSV / HSBhsv(158.2, 40%, 21.6%)
CMYK40%, 0%, 14.5%, 78.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,176,815
CSS custom property--colour: #21372F;

Brightness & contrast

Relative luminance0.03261WCAG 2.x, 0 is black and 1 is white
Perceived brightness48.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.71:1
Contrast with white12.71:1WCAG normal text: AAA
Contrast with black1.65:1WCAG normal text: Fail
Greyscale equivalent#323232
Inverted#DEC8D0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#36342Fno red cones; affects about 1% of men; ΔE 10.8 from the original
Deuteranopia#323130no green cones; the most common form, about 1% of men; ΔE 11.2 from the original
Tritanopia#1B3735no blue cones; rare, and affects men and women equally; ΔE 4.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.71:1WCAG large text: AAA
Contrast with black, large text1.65:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 11.9Black · ΔE 23.8Dim grey · ΔE 25.9Teal · ΔE 34.3Gray · ΔE 34.4Slate grey · ΔE 35.4
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 11.85, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#372129
Analogous#213724, #213437
Triadic#2F2137, #372F21
Split complementary#372134, #372421
Tetradic#242137, #372129, #343721

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#77AD99
Lighter +30%#5A9781
Lighter +20%#477765
Lighter +10%#34574A
Darker −10%#0E1714
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#164232
Less saturated −25%#2C2C2C

Channel breakdown

R33
G55
B47
Red33 (12.9%)
Green55 (21.6%)
Blue47 (18.4%)
Hue158.18°
Saturation (HSL)25%
Lightness17.25%
Dominant channelGreen
Hex per channelR 21 · G 37 · B 2F

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Every value on this page was computed from “21372f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.