[Solved]-How to change series legend text color in HighChart chart?-Highcharts

Here we go:

You need to specify itemStyle. e.g.

itemStyle:{'font-size':'30px'}

Depending on the css you want to use, you may also have to set 'useHTML'. From the documentation:

Using HTML allows for advanced formatting, images and reliable bi-directional text rendering.

Here is an example: http://jsfiddle.net/kHzr9/

Hope it helps;)