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Recognised as Colour

#3183CD

  • #3183CD
  • Blue
  • Dark
  • Nearest: Cornflower blue

#3183CD is a blue with RGB values 49, 131, 205 and HSL 208°, 61%, 50%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#3183CD#3183CD
HEX#3183CD
RGBrgb(49, 131, 205)
RGB (0–1)0.1922, 0.5137, 0.8039
RGB percentages19.2%, 51.4%, 80.4%
HSLhsl(208.5, 61.4%, 49.8%)
HSV / HSBhsv(208.5, 76.1%, 80.4%)
CMYK76.1%, 36.1%, 0%, 19.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,245,005
CSS custom property--colour: #3183CD;

Brightness & contrast

Relative luminance0.21293WCAG 2.x, 0 is black and 1 is white
Perceived brightness124.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.26:1
Contrast with white3.99:1WCAG normal text: Fail
Contrast with black5.26:1WCAG normal text: AA
Greyscale equivalent#777777
Inverted#CE7C32

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6187D0no red cones; affects about 1% of men; ΔE 8.4 from the original
Deuteranopia#4979CCno green cones; the most common form, about 1% of men; ΔE 9.9 from the original
Tritanopia#00959Eno blue cones; rare, and affects men and women equally; ΔE 43.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.99:1WCAG large text: AA
Contrast with black, large text5.26:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 12.8Steel blue · ΔE 14Dodgerblue · ΔE 21.2Deep skyblue · ΔE 26.8Royal blue · ΔE 32.8Light skyblue · ΔE 33.4
Nearest named CSS colourCornflower blue (#6495ED)ΔE 12.82, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CD7B31
Analogous#31CDC9, #3135CD
Triadic#CD3183, #83CD31
Split complementary#CD3135, #CDC931
Tetradic#C931CD, #CD7B31, #35CD31

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D5E6F5
Lighter +30%#ACCDEB
Lighter +20%#83B4E1
Lighter +10%#5A9CD7
Darker −10%#2769A4
Darker −20%#1D4E7B
Darker −30%#133452
Darker −40%#0A1A28
More saturated +25%#1185ED
Less saturated −25%#5181AD

Channel breakdown

R49
G131
B205
Red49 (19.2%)
Green131 (51.4%)
Blue205 (80.4%)
Hue208.46°
Saturation (HSL)61.42%
Lightness49.8%
Dominant channelBlue
Hex per channelR 31 · G 83 · B CD

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Every value on this page was computed from “3183cd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.