Create Color from a String

stringToColor.ts

 /**
   * Renders an idempotent-ly random color hex code based on the input string
   * @param str 
   * @returns 
   */
  stringToColor(str: string): string {
    /**
     * will end up as a 3-byte "char" array
     */
    var hex: number[] = [];
    var exciterRanges = [
      [32,70],
      [71,79],
      [80,95]];
    var exciters =[0,0,0];
    const MAX_COLOR_BRIGHTNESS = 190;
    const MIN_COLOR_BRIGHTNESS = 60;
    const MOD=3;
    for(var i=0;i<3*str.length;i++) {
      for(var y=0;y<3;y++) {
        exciters[y] += (exciterRanges[y][0] < str.toUpperCase().charCodeAt(i%str.length) && 
          exciterRanges[y][1] > str.toUpperCase().charCodeAt(i%str.length)
          )?1 : 0
      }
      hex[i%MOD] =(Math.trunc((str.charCodeAt(i%MOD) + str.charCodeAt(i%str.length)*exciters[i%MOD])/2) % MAX_COLOR_BRIGHTNESS);
      if(hex[i%MOD] < MIN_COLOR_BRIGHTNESS) { hex[i%MOD] = MIN_COLOR_BRIGHTNESS }
      //console.log("hex: @"  + i%MOD + "(" + i%MOD +  "): " + hex[i%MOD] + " exciter: " + exciters[i%MOD])
    }
    // convert the byte array to a string
    var retCode:string = '#';
    for(var i=0;i<MOD;i++) {
      retCode += hex[i].toString(16);
    }
    console.log("color " + retCode + " from: " + str)
    return retCode;
  }