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Recognised as Colour

#212C39

  • #212C39
  • Blue
  • Dark
  • Nearest: Dark slate grey

#212C39 is a blue with RGB values 33, 44, 57 and HSL 213°, 27%, 18%. It is a dark colour, so white text on it reaches 14.2:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#212C39#212C39
HEX#212C39
RGBrgb(33, 44, 57)
RGB (0–1)0.1294, 0.1725, 0.2235
RGB percentages12.9%, 17.3%, 22.4%
HSLhsl(212.5, 26.7%, 17.6%)
HSV / HSBhsv(212.5, 42.1%, 22.4%)
CMYK42.1%, 22.8%, 0%, 77.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,174,009
CSS custom property--colour: #212C39;

Brightness & contrast

Relative luminance0.0242WCAG 2.x, 0 is black and 1 is white
Perceived brightness42.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.15:1
Contrast with white14.15:1WCAG normal text: AAA
Contrast with black1.48:1WCAG normal text: Fail
Greyscale equivalent#2B2B2B
Inverted#DED3C6

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#272C3Ano red cones; affects about 1% of men; ΔE 2.6 from the original
Deuteranopia#242A39no green cones; the most common form, about 1% of men; ΔE 2.6 from the original
Tritanopia#192F30no blue cones; rare, and affects men and women equally; ΔE 10 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.15:1WCAG large text: AAA
Contrast with black, large text1.48:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 18.6Black · ΔE 20.1Dim grey · ΔE 28.6Slate grey · ΔE 35.3Gray · ΔE 37.4Light slate grey · ΔE 38.4
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 18.6, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#392E21
Analogous#213839, #222139
Triadic#39212C, #2C3921
Split complementary#392221, #383921
Tetradic#392138, #392E21, #213922

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7691B0
Lighter +30%#59779A
Lighter +20%#465E7A
Lighter +10%#344559
Darker −10%#0E1319
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#162B44
Less saturated −25%#2C2D2E

Channel breakdown

R33
G44
B57
Red33 (12.9%)
Green44 (17.3%)
Blue57 (22.4%)
Hue212.5°
Saturation (HSL)26.67%
Lightness17.65%
Dominant channelBlue
Hex per channelR 21 · G 2C · B 39

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Every value on this page was computed from “212c39” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.