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Colour

#212B37

  • #212B37
  • Blue
  • Dark
  • Nearest: Dark slate grey

#212B37 is a blue with RGB values 33, 43, 55 and HSL 213°, 25%, 17%. It is a dark colour, so white text on it reaches 14.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#212B37#212B37
HEX#212B37
RGBrgb(33, 43, 55)
RGB (0–1)0.1294, 0.1686, 0.2157
RGB percentages12.9%, 16.9%, 21.6%
HSLhsl(212.7, 25%, 17.3%)
HSV / HSBhsv(212.7, 40%, 21.6%)
CMYK40%, 21.8%, 0%, 78.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,173,751
CSS custom property--colour: #212B37;

Brightness & contrast

Relative luminance0.02327WCAG 2.x, 0 is black and 1 is white
Perceived brightness41.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.33:1
Contrast with white14.33:1WCAG normal text: AAA
Contrast with black1.47:1WCAG normal text: Fail
Greyscale equivalent#2A2A2A
Inverted#DED4C8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#272B38no red cones; affects about 1% of men; ΔE 2.6 from the original
Deuteranopia#242937no green cones; the most common form, about 1% of men; ΔE 2.6 from the original
Tritanopia#1A2E2Fno blue cones; rare, and affects men and women equally; ΔE 9.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.33:1WCAG large text: AAA
Contrast with black, large text1.47:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 18.7Black · ΔE 19.4Dim grey · ΔE 28.8Slate grey · ΔE 35.8Gray · ΔE 37.6Light slate grey · ΔE 38.9
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 18.73, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#372D21
Analogous#213637, #222137
Triadic#37212B, #2B3721
Split complementary#372221, #363721
Tetradic#372136, #372D21, #213722

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7790AD
Lighter +30%#5A7697
Lighter +20%#475D77
Lighter +10%#344457
Darker −10%#0E1217
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#162A42
Less saturated −25%#2C2C2C

Channel breakdown

R33
G43
B55
Red33 (12.9%)
Green43 (16.9%)
Blue55 (21.6%)
Hue212.73°
Saturation (HSL)25%
Lightness17.25%
Dominant channelBlue
Hex per channelR 21 · G 2B · B 37

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Every value on this page was computed from “212b37” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.