Apache Echarts - change the color of grid elements

Hi,

How can I change the colors of the lines and text in the image bellow.
https://codesandbox.io/s/wy90g2?file=/index.js

option = {
  grid:{
      show: false
  },
  xAxis: {
    type: 'category',
    data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
  },
  yAxis: {
    type: 'value'
  },
  series: [
    {
      data: [120, 200, 150, 80, 70, 110, 130],
      type: 'bar'
    }
  ]
};

Thanks