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Recognised as Colour

#3D3366

  • #3D3366
  • Blue
  • Dark
  • Nearest: Dark slateblue

#3D3366 is a blue with RGB values 61, 51, 102 and HSL 252°, 33%, 30%. 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

#3D3366#3D3366
HEX#3D3366
RGBrgb(61, 51, 102)
RGB (0–1)0.2392, 0.2, 0.4
RGB percentages23.9%, 20%, 40%
HSLhsl(251.8, 33.3%, 30%)
HSV / HSBhsv(251.8, 50%, 40%)
CMYK40.2%, 50%, 0%, 60%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,010,854
CSS custom property--colour: #3D3366;

Brightness & contrast

Relative luminance0.04319WCAG 2.x, 0 is black and 1 is white
Perceived brightness61.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.27:1
Contrast with white11.27:1WCAG normal text: AAA
Contrast with black1.86:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#C2CC99

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#203C68no red cones; affects about 1% of men; ΔE 12.8 from the original
Deuteranopia#213A65no green cones; the most common form, about 1% of men; ΔE 12.3 from the original
Tritanopia#323D47no blue cones; rare, and affects men and women equally; ΔE 28.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.27:1WCAG large text: AAA
Contrast with black, large text1.86:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 16.8Midnight blue · ΔE 26.6Rebecca purple · ΔE 32.1Steel blue · ΔE 35.7Slate grey · ΔE 39Dim grey · ΔE 39.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 16.85, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5C6633
Analogous#334366, #573366
Triadic#663D33, #33663D
Split complementary#665733, #436633
Tetradic#663343, #5C6633, #336657

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A399CC
Lighter +30%#8477BB
Lighter +20%#6655AA
Lighter +10%#514488
Darker −10%#292244
Darker −20%#141122
Darker −30%#000000
Darker −40%#000000
More saturated +25%#312079
Less saturated −25%#494653

Channel breakdown

R61
G51
B102
Red61 (23.9%)
Green51 (20%)
Blue102 (40%)
Hue251.76°
Saturation (HSL)33.33%
Lightness30%
Dominant channelBlue
Hex per channelR 3D · G 33 · B 66

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Every value on this page was computed from “3d3366” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.