From husband:Does anyone know if there's any way to color wood naturally without chemicals or paint. I know that you can color eggs and cloth using herbs and onion skins but I don't know if it's weather proof. I'm open to any ideas that anyone might have. Please let me know what you think.
use a colored wood. For example “Purple Heart” wood, etc. but, UV light will bleach out the color. But a pressure washer or sander will refresh the color bc top layer is removed.
Natural veg/flower dyes, but will need to be reapplied bc of UV rays. And wood will naturally grey out.
Add a “mordant” which helps set any dye.
Beware of “natural”….bc cadmium (as an example) is natural, but don’t use it

Now he’s talking too fast for me to type….but did also mention rusty nails for a rust orange color.