How to change Font and text color, border color in Gantt chart Highcharts?

I want to change font family, font size, font color so that my entire chart should have same font and color.
I know using style api i can do that but it only changes in some places
Here i want blue border everywhere but I see option to set border color for xAxis, YAxis, and chart](https://i.stack.imgur.com/llOp9.png)

But this does not look good.
Is there way i can set border color, font size, font family, font color all these css styles so that entire chart looks uniform to me.

      [Code Pen](https://codepen.io/manshi44/pen/OJaXOOr)

Tried api https://api.highcharts.com/highstock/chart.style and few other to change styling

To change the font, just set chart.style.fontFamily property:

<!-- language: lang-js -->

chart: {
  style: {
    fontFamily: 'Fasthand'
  }
}

As for text color, you can set styles for each element, you can do this for title, axis labels, credits and all the rest:

<!-- language: lang-js -->

title: {
  style: {
    color: 'red'
  }
}

Border color you need to remember about the grid, tick and lines of all axes, there are 2 x-axes in the gant by default, separate for months and separate for years:

<!-- language: lang-js -->

xAxis: [{
  gridLineColor: 'blue',
  tickColor: 'blue',
  lineColor: 'blue'
}, {
  labels: {
    style: {
      color: 'red'
    }
  },
  tickColor: 'blue',
  lineColor: 'blue'
}]

Demo: https://jsfiddle.net/BlackLabel/5Lj6xbo8/ <br/>

API: https://api.highcharts.com/highstock/chart.style <br/>
https://api.highcharts.com/highcharts/xAxis.labels.style.color <br/>
https://api.highcharts.com/highcharts/title.style.color <br/>
https://api.highcharts.com/highcharts/credits.style.color <br/>