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Recognised as Colour

#0C3583

  • #0C3583
  • Blue
  • Dark
  • Nearest: Dark slateblue

#0C3583 is a blue with RGB values 12, 53, 131 and HSL 219°, 83%, 28%. 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

#0C3583#0C3583
HEX#0C3583
RGBrgb(12, 53, 131)
RGB (0–1)0.0471, 0.2078, 0.5137
RGB percentages4.7%, 20.8%, 51.4%
HSLhsl(219.3, 83.2%, 28%)
HSV / HSBhsv(219.3, 90.8%, 51.4%)
CMYK90.8%, 59.5%, 0%, 48.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer800,131
CSS custom property--colour: #0C3583;

Brightness & contrast

Relative luminance0.04263WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.34:1
Contrast with white11.34:1WCAG normal text: AAA
Contrast with black1.85:1WCAG normal text: Fail
Greyscale equivalent#323232
Inverted#F3CA7C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004086no red cones; affects about 1% of men; ΔE 8.7 from the original
Deuteranopia#003582no green cones; the most common form, about 1% of men; ΔE 1.2 from the original
Tritanopia#004956no blue cones; rare, and affects men and women equally; ΔE 48 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.34:1WCAG large text: AAA
Contrast with black, large text1.85:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 10.9Midnight blue · ΔE 15.5Rebecca purple · ΔE 25.3Slate blue · ΔE 28.8Royal blue · ΔE 30.2Indigo · ΔE 33.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 10.92, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#835A0C
Analogous#0C7083, #1F0C83
Triadic#830C35, #35830C
Split complementary#831F0C, #71830C
Tetradic#830C70, #835A0C, #0C831E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6A98F1
Lighter +30%#3B78ED
Lighter +20%#155BE0
Lighter +10%#1048B2
Darker −10%#082254
Darker −20%#030F26
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00318F
Less saturated −25%#1E3B71

Channel breakdown

R12
G53
B131
Red12 (4.7%)
Green53 (20.8%)
Blue131 (51.4%)
Hue219.33°
Saturation (HSL)83.22%
Lightness28.04%
Dominant channelBlue
Hex per channelR 0C · G 35 · B 83

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Every value on this page was computed from “0c3583” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.