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Recognised as Colour

#33317A

  • #33317A
  • Blue
  • Dark
  • Nearest: Dark slateblue

#33317A is a blue with RGB values 51, 49, 122 and HSL 242°, 43%, 34%. It is a dark colour, so white text on it reaches 11.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#33317A#33317A
HEX#33317A
RGBrgb(51, 49, 122)
RGB (0–1)0.2, 0.1922, 0.4784
RGB percentages20%, 19.2%, 47.8%
HSLhsl(241.6, 42.7%, 33.5%)
HSV / HSBhsv(241.6, 59.8%, 47.8%)
CMYK58.2%, 59.8%, 0%, 52.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,355,002
CSS custom property--colour: #33317A;

Brightness & contrast

Relative luminance0.04306WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.28:1
Contrast with white11.28:1WCAG normal text: AAA
Contrast with black1.86:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#CCCE85

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003D7Cno red cones; affects about 1% of men; ΔE 14.2 from the original
Deuteranopia#003878no green cones; the most common form, about 1% of men; ΔE 12.3 from the original
Tritanopia#0E4250no blue cones; rare, and affects men and women equally; ΔE 44.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.28:1WCAG large text: AAA
Contrast with black, large text1.86:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 6.7Midnight blue · ΔE 14.4Rebecca purple · ΔE 21.7Slate blue · ΔE 29.1Indigo · ΔE 30.8Royal blue · ΔE 33.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 6.68, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#787A31
Analogous#31547A, #57317A
Triadic#7A3331, #317A33
Split complementary#7A5831, #547A31
Tetradic#7A3154, #787A31, #317A58

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A09FD8
Lighter +30%#7C7ACA
Lighter +20%#5956BB
Lighter +10%#42409E
Darker −10%#242256
Darker −20%#151431
Darker −30%#05050D
Darker −40%#000000
More saturated +25%#1F1C8F
Less saturated −25%#474665

Channel breakdown

R51
G49
B122
Red51 (20%)
Green49 (19.2%)
Blue122 (47.8%)
Hue241.64°
Saturation (HSL)42.69%
Lightness33.53%
Dominant channelBlue
Hex per channelR 33 · G 31 · B 7A

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Every value on this page was computed from “33317a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.