Play with a few codes to see which colors you like the most. But, keep in mind that dark backgrounds are hard on the eye. Choose subtle and soft colors for the background (nothing beats white for business)and brigther colors for the characters.
Here is how you change font colors (these codes work for background colors too):
This is blue
This is turquoise
This is bright green
This is pink
This is red
This is yellow
This is white
This is dark blue
This is teal
This is green
This is violet
This is dark red
This is dark yellow
This is 50% gray
This is 25% gray