How to change the font and grid color in Charts component

Hi, I have this chart with a dark blue background and I would like to change the color of the font and the grid lines to white so they can be seen.

Captura de Pantalla 2020-09-19 a la(s) 05.00.382198×808 49.6 KB

I’ve been going through the documentation of charts.js and tried to change the color like this:

dmx-bind:defaultColor = "#fff"

dmx-bind:color = "#fff"

and of corse with 
color="#fff"

Unsuccessfully

I also saw this post: howto/how-to-set-the-colour-of-a-donut-chart/17276

Where @Patrick talked about how to change the color of the data line.

I know I can go to the file Chart.min.js and change the color by hand, but I prefer not to do it that way.

(R._set ("global", {defaultColor: "rgba (0,0,0,0.1)", defaultFontColor: "# 666", defaultFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans- serif ")

Captura de Pantalla 2020-09-19 a la(s) 05.03.192186×798 51.4 KB

Any suggestions will be appreciated. Thanks in advance