• Adobe After Effects Expressions

  Expression to color specific numbers

  Posted by Richard Clayton on June 20, 2019 at 3:44 pm

  I’ve created a count down clock using this expression:

  I want to be able to assign a rgb colour value to each number, for example all 7’s are green or all 2’s are red etc…

  rateOfSpeed = 1;
clockStartTime = thisComp.layer("TIMER DURATION").effect("Slider Control")("Slider")*60;

  function addZero(n) {
  if (n<10) return "0" + n else return n;
  }

  clockTimeNumber = Math.floor(clockStartTime-rateOfSpeed*time);

  minutes = Math.floor(clockTimeNumber/60);
seconds = clockTimeNumber%60;
addZero(minutes) + ":"+ addZero(seconds);

  Oleg Pirogov replied 7 years, 1 month ago 2 Members · 1 Reply
• 1 Reply

• 

  Oleg Pirogov

  June 21, 2019 at 7:38 am

  Depending on how much control you want over the colors you may or may not settle on this:

  1) Add a text animator for Fill Color -> Hue
  2) Set Fill Hue to =1x 0.0
  3) Delete Range Selector
  4) Add Expression Selector
  5) Add this code to the Amount expression:
  colors = [0,10,20,30,40,50,60,70,80,90];
N=Number(text.sourceText[textIndex-1])
if (!isNaN(N)) {colors[N]}
else {30}
  And get this:
  

  This allows you to define 10 colors for 10 digits plus 1 additional color for non-digit characters (dot “.” is evaluated as “0” digit). A color is specified with a number from 0 to 100 corresponding to hue scale: 0 for 0, 100 for 360 degrees. Not a full RGB range but still. Digit colors are specified in array [0,10,20,30,40,50,60,70,80,90] : 1st element is for digit “0”, 2nd for “1” etc. Value in else {…} is for non-digits.

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