code: function colorCoordValue(channel, pos) {
    const color = {};
    pos.x = Math.round(pos.x);
    pos.y = Math.round(pos.y);
  
    switch (channel) {
      case 'r':
        color.b = pos.x;
        color.g = 255 - pos.y;
        break;
      case 'g':
        color.b = pos.x;
        color.r = 255 - pos.y;
        break;
      case 'b':
        color.r = pos.x;
        color.g = 255 - pos.y;
        break;
      case 'h':
        color.s = pos.x;
        color.l = 100 - pos.y;
        break;
      case 's':
        color.h = pos.x;
        color.l = 100 - pos.y;
        break;
      case 'l':
        color.h = pos.x;
        color.s = 100 - pos.y;
        break;
    }
  
    return color;
  }
docs: Takes a channel and returns its sibling values based on x,y positions
  
  R: x = b, y = g
  G: x = b, y = r
  B: x = r, y = g
  
  H: x = s, y = l
  S: x = h, y = l
  L: x = h, y = s
  
  @param {string} channel one of `r`, `g`, `b`, `h`, `s`, or `l`
  @param {Object} pos x, y coordinates
  @return {Object} Changed sibling values