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Recognised as Colour

#333A8D

  • #333A8D
  • Blue
  • Dark
  • Nearest: Dark slateblue

#333A8D is a blue with RGB values 51, 58, 141 and HSL 235°, 47%, 38%. It is a dark colour, so white text on it reaches 9.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#333A8D#333A8D
HEX#333A8D
RGBrgb(51, 58, 141)
RGB (0–1)0.2, 0.2275, 0.5529
RGB percentages20%, 22.7%, 55.3%
HSLhsl(235.3, 46.9%, 37.6%)
HSV / HSBhsv(235.3, 63.8%, 55.3%)
CMYK63.8%, 58.9%, 0%, 44.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,357,325
CSS custom property--colour: #333A8D;

Brightness & contrast

Relative luminance0.05653WCAG 2.x, 0 is black and 1 is white
Perceived brightness70.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.86:1
Contrast with white9.86:1WCAG normal text: AAA
Contrast with black2.13:1WCAG normal text: Fail
Greyscale equivalent#3F3F3F
Inverted#CCC572

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004790no red cones; affects about 1% of men; ΔE 13.4 from the original
Deuteranopia#003F8Bno green cones; the most common form, about 1% of men; ΔE 9.7 from the original
Tritanopia#004E5Dno blue cones; rare, and affects men and women equally; ΔE 50.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.86:1WCAG large text: AAA
Contrast with black, large text2.13:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 5.8Midnight blue · ΔE 14.9Rebecca purple · ΔE 19.1Slate blue · ΔE 23.1Royal blue · ΔE 26.6Indigo · ΔE 29.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 5.82, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8D8633
Analogous#33678D, #59338D
Triadic#8D333A, #3A8D33
Split complementary#8D5933, #678D33
Tetradic#8D3367, #8D8633, #338D59

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ABAFE1
Lighter +30%#868CD3
Lighter +20%#6068C6
Lighter +10%#4149B2
Darker −10%#252B68
Darker −20%#181B42
Darker −30%#0A0C1D
Darker −40%#000000
More saturated +25%#1B26A5
Less saturated −25%#4B4E75

Channel breakdown

R51
G58
B141
Red51 (20%)
Green58 (22.7%)
Blue141 (55.3%)
Hue235.33°
Saturation (HSL)46.88%
Lightness37.65%
Dominant channelBlue
Hex per channelR 33 · G 3A · B 8D

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Every value on this page was computed from “333a8d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.