Question

how do you change the font text color in a label from code?

Answer 1

get_node("Label").add_color_override("font_color", Color(1,0,0,1))

Answer 2

Example

set("custom_colors/font_color",Color(1,0,0))

any parameter that doesn't have a direct getter or setter method can be accessed through
get(-the path hint you get when mousing over any parameter-)
e.g "custom_colors/font_color"

get() also needs a second parameter witch is what you want to change
e.g Color(1,0,0)

Comments

Can you change a property of the color directly? e.g. the alpha? If so, how?

Answer 3

get_node("Label").set("custom_colors/default_color", Color(1,1,1,1))

The above would be white text.

Comments

Thanks, this was very helpful. I assume things have been updated since 2017 as none of the other answers worked!

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Thanks. It's a bit of trial and error sometimes. I'll try to contribute as much as I can. All the best!