Google Charts - Change individual bar color

Question

With Google Charts bar graph, is it possible to to change the color of one bar. For example I\'d like to make the 2006 data red (other bars are blue).

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Answer 1

Here's an example of the above tips

google.charts.load('current', { packages: ['corechart', 'bar'] })
google.charts.setOnLoadCallback(drawStacked)

function mt_rand (min, max) {
  var argc = arguments.length
  if (argc === 0) {
    min = 0
    max = 2147483647
  } else if (argc === 1) {
    throw new Error('Warning: mt_rand() expects exactly 2 parameters, 1 given')
  }
  return Math.floor(Math.random() * (max - min + 1)) + min
}

function dechex (d) {
  var hex = Number(d).toString(16)
  hex = '000000'.substr(0, 6 - hex.length) + hex
  return hex
}

function str_pad (str) {
  str += ''
  while (str.length < 3) {
    str = str + str
  }
  return str
}

function random_color_part () {
  // return str_pad( dechex( mt_rand( 0, 255 ) ), 2, '0', 1);
  return mt_rand(0, 255)
}

function random_color () {
  return 'rgb(' + random_color_part() + ',' + random_color_part() + ',' + random_color_part() + ')'
}

let $color = random_color()
// alert($color);

function drawStacked () {
  // var data = new google.visualization.DataTable();

  var data = google.visualization.arrayToDataTable([
    ['Element', 'Density', { role: 'style' }],
    ['cor-glenio-aleatoria', 8.94, random_color()], // RGB value
    ['cor-arlei-aleatoria', 10.49, random_color()], // English color name
    ['outra cor', 19.30, random_color()],

    ['outra cor fixa', 21.45, 'color: #e5e4e2' ] // CSS-style declaration
  ])

  var options = {
    title: 'Motivation and Energy Level Throughout the Day',
    isStacked: true,
    hAxis: {
      title: 'Time of Day',
      format: 'h:mm a',
      viewWindow: {
        min: [7, 30, 0],
        max: [17, 30, 0]
      }
    },
    vAxis: {
      title: 'Rating (scale of 1-10)'
    }
  }

  var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'))
  chart.draw(data, options)
}

https://jsfiddle.net/zeh3pn6d/2