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Recognised as Colour

#21339E

  • #21339E
  • Blue
  • Dark
  • Nearest: Midnight blue

#21339E is a blue with RGB values 33, 51, 158 and HSL 231°, 65%, 37%. It is a dark colour, so white text on it reaches 10.3:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#21339E#21339E
HEX#21339E
RGBrgb(33, 51, 158)
RGB (0–1)0.1294, 0.2, 0.6196
RGB percentages12.9%, 20%, 62%
HSLhsl(231.4, 65.4%, 37.5%)
HSV / HSBhsv(231.4, 79.1%, 62%)
CMYK79.1%, 67.7%, 0%, 38%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,175,902
CSS custom property--colour: #21339E;

Brightness & contrast

Relative luminance0.0516WCAG 2.x, 0 is black and 1 is white
Perceived brightness68.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.34:1
Contrast with white10.34:1WCAG normal text: AAA
Contrast with black2.03:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#DECC61

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0046A1no red cones; affects about 1% of men; ΔE 15.5 from the original
Deuteranopia#003A9Cno green cones; the most common form, about 1% of men; ΔE 7.9 from the original
Tritanopia#005064no blue cones; rare, and affects men and women equally; ΔE 62.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.34:1WCAG large text: AAA
Contrast with black, large text2.03:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 15.3Rebecca purple · ΔE 17.1Slate blue · ΔE 18.5Dark slateblue · ΔE 19.3Navy · ΔE 21Indigo · ΔE 21
Nearest named CSS colourMidnight blue (#191970)ΔE 15.28, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9E8C21
Analogous#21719E, #4D219E
Triadic#9E2133, #339E21
Split complementary#9E4E21, #719E21
Tetradic#9E2172, #9E8C21, #219E4E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A0ABEB
Lighter +30%#7685E2
Lighter +20%#4B60DA
Lighter +10%#2A41C8
Darker −10%#182574
Darker −20%#0F184A
Darker −30%#070A1F
Darker −40%#000000
More saturated +25%#0922B6
Less saturated −25%#394486

Channel breakdown

R33
G51
B158
Red33 (12.9%)
Green51 (20%)
Blue158 (62%)
Hue231.36°
Saturation (HSL)65.45%
Lightness37.45%
Dominant channelBlue
Hex per channelR 21 · G 33 · B 9E

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Every value on this page was computed from “21339e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.